@article {B-73,
    AUTHOR = {Balabanova, R.},
     TITLE = {Hexagonal circular three-webs},
   JOURNAL = {Plovdiv. Univ. Paisi\'{\i} Khilendarski Nauchn. Trud. Mat.},
  FJOURNAL = {Plovdivski Universitet ``Paisi\'{\i} Khilendarski''. Nauchni Trudove},
    VOLUME = {11},
      YEAR = {1973},
    NUMBER = {4},
     PAGES = {128--141},
}

@book {B-29,
    AUTHOR = {Blaschke, Wilhelm},
     TITLE = {Vorlesungen \"uber differentialgeometrie und geometrische grundlagen von einsteins relativit\"atstheorie.
      {III}: {D}ifferentialgeometrie der kreise und kugeln},
    SERIES = {Grundlehren Math. Wiss.},
    VOLUME = {29},
 PUBLISHER = {Springer, Berlin},
      YEAR = {1929},
     PAGES = {viii+339},
       DOI = {10.1007/978-3-642-50823-3},
       URL = {https://doi.org/10.1007/978-3-642-50823-3},
}

@book {BB-38,
    AUTHOR = {Blaschke, Wilhelm and Bol, Gerrit},
     TITLE = {Geometrie der gewebe. {T}opologische fragen der
              differentialgeometrie},
 PUBLISHER = {Springer, Berlin},
      YEAR = {1938},
}

@book {B-55,
    AUTHOR = {Blaschke, Wilhelm},
     TITLE = {Einf\"uhrung in die geometrie der {W}aben},
 PUBLISHER = {Birkh\"{a}user, Basel},
      YEAR = {1955},
     PAGES = {108},
       DOI = {10.1007/978-3-0348-6952-2},
       URL = {https://doi.org/10.1007/978-3-0348-6952-2},
}

@article {GS-24,
    AUTHOR = {Graf, H. and Sauer, R.},
     TITLE = {\"Uber dreifache Geradensysteme in der Ebene, welche Dreiecksnetze bilden},
   JOURNAL = {Sitzungsb. Math.-Naturw. Abt.},
  FJOURNAL = {Sitzungsberichte der Kaiserlichen Akademie der Wissenschaften.
   Mathematisch-Naturwissenschaftliche Classe},
      YEAR = {1924},
     PAGES = {119--156},
}

@phdthesis {E-74,
    AUTHOR = {Erdo\v{g}an, H. I.},
     TITLE = {D\"uzlemde $6$-gen doku te\c{s}kil eden \v{c}ember demety $3$-\"uzleri},
      NOTE = {{I}stanbul Teknik Ueniversitesi, Istanbul, 1974},
}

@article {E-89,
    AUTHOR = {Erdo\v{g}an, H. I.},
     TITLE = {Triples of circle-pencils forming a hexagonal three-web in~{$E^2$}},
   JOURNAL = {J.~Geom.},
  FJOURNAL = {Journal of Geometry},
    VOLUME = {35},
      YEAR = {1989},
    NUMBER = {1--2},
     PAGES = {39--65},
       DOI = {10.1007/BF01222261},
       URL = {https://doi.org/10.1007/BF01222261},
}

@incollection {L-77,
    AUTHOR = {Lazareva, V. B.},
     TITLE = {Three-webs formed by families of circles on the plane},
 BOOKTITLE = {Differential {G}eometry},
     PAGES = {49--64},
 PUBLISHER = {Kalinin. Gos. Univ., Kalinin},
      YEAR = {1977},
}

@article {L-21,
    AUTHOR = {Lubbes, Niels},
     TITLE = {Surfaces that are covered by two pencils of circles},
   JOURNAL = {Math.~Z.},
  FJOURNAL = {Mathematische Zeitschrift},
    VOLUME = {299},
      YEAR = {2021},
    NUMBER = {3--4},
     PAGES = {1445--1472},
       DOI = {10.1007/s00209-021-02713-x},
       URL = {https://doi.org/10.1007/s00209-021-02713-x},
    EPRINT = {1302.6710},
}

@article {N-14,
    AUTHOR = {Nilov, F. K.},
     TITLE = {On new constructions in the {B}laschke--{B}ol problem},
   JOURNAL = {Sb. Math.},
  FJOURNAL = {Sbornik: Mathematics},
    VOLUME = {205},
      YEAR = {2014},
    NUMBER = {11},
     PAGES = {1650--1667},
       DOI = {10.1070/SM2014v205n11ABEH004432},
       URL = {https://doi.org/10.1070/SM2014v205n11ABEH004432},
}

@article {PSS-12,
    AUTHOR = {Pottmann, Helmut and Shi, Ling and Skopenkov, Mikhail},
     TITLE = {Darboux cyclides and webs from circles},
   JOURNAL = {Comput. Aided Geom. Design},
  FJOURNAL = {Computer Aided Geometric Design},
    VOLUME = {29},
      YEAR = {2012},
    NUMBER = {1},
     PAGES = {77--97},
       DOI = {10.1016/j.cagd.2011.10.002},
       URL = {https://doi.org/10.1016/j.cagd.2011.10.002},
    EPRINT = {1106.1354},
}

@article {S-05,
    AUTHOR = {Shelekhov, A. M.},
     TITLE = {Classifications of regular 3-webs formed by pencils of
              circles},
   JOURNAL = {J.~Math. Sci.},
  FJOURNAL = {Journal of Mathematical Sciences},
    VOLUME = {143},
      YEAR = {2007},
    NUMBER = {6},
     PAGES = {3607--3629},
       DOI = {10.1007/s10958-007-0225-z},
       URL = {https://doi.org/10.1007/s10958-007-0225-z},
}

@article {S-32,
    AUTHOR = {Strubecker, Karl},
     TITLE = {\"{U}ber eine klasse spezieller dreiecksnetze aus kreisen},
   JOURNAL = {Monatsh. Math. Phys.},
  FJOURNAL = {Monatshefte f\"ur Mathematik und Physik},
    VOLUME = {39},
      YEAR = {1932},
    NUMBER = {1},
     PAGES = {395--398},
       DOI = {10.1007/BF01699080},
       URL = {https://doi.org/10.1007/BF01699080},
}

@article {V-29,
    AUTHOR = {Volk, O},
     TITLE = {\"{U}ber spezielle kreisnetze},
   JOURNAL = {Sitzungsberichte M\"{u}nchen},
  FJOURNAL = {Sitzungsberichte M\"{u}nchen},
    VOLUME = {59},
      YEAR = {1929},
     PAGES = {125--134},
}

@article {W-38,
    AUTHOR = {Wunderlich, W.},
     TITLE = {\"Uber ein besonderes dreiecksnetz aus kreisen},
   JOURNAL = {Sitzungsber. Akad. Wiss.},
  FJOURNAL = {Sitzungsberichte der Kaiserlichen Akademie der Wissenschaften in Wien},
    VOLUME = {147},
      YEAR = {1938},
     PAGES = {385--399},
}
