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%W  manual.bib           Congruence documentation               Ann Dooms
%W                                                           Eric Jespers
%W                                                     Olexandr Konovalov
%%                                                         Helena Verrill
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@article {LLT-Hecke,
    AUTHOR = {Lang, Mong-Lung and Lim, Chong-Hai and Tan, Ser Peow},
     TITLE = {Independent generators for congruence subgroups of {H}ecke
              groups},
   JOURNAL = {Math. Z.},
  FJOURNAL = {Mathematische Zeitschrift},
    VOLUME = {220},
      YEAR = {1995},
    NUMBER = {4},
     PAGES = {569--594},
      ISSN = {0025-5874},
     CODEN = {MAZEAX},
   MRCLASS = {11F06 (30F35)},
  MRNUMBER = {MR1363856 (96k:11049)},
MRREVIEWER = {O. V. Shvartsman},
}
		

@article {LLT-Algorithm,
    AUTHOR = {Lang, Mong-Lung and Lim, Chong-Hai and Tan, Ser Peow},
     TITLE = {An algorithm for determining if a subgroup of the modular
              group is congruence},
   JOURNAL = {J. London Math. Soc. (2)},
  FJOURNAL = {Journal of the London Mathematical Society. Second Series},
    VOLUME = {51},
      YEAR = {1995},
    NUMBER = {3},
     PAGES = {491--502},
      ISSN = {0024-6107},
     CODEN = {JLMSAK},
   MRCLASS = {11F06 (20H10 30F35)},
  MRNUMBER = {MR1332886 (96f:11064)},
MRREVIEWER = {B. Sury},
}
		

@article {CLT,
    AUTHOR = {Chan, Shih-Ping and Lang, Mong-Lung and Lim, Chong-Hai and
              Tan, Ser Peow},
     TITLE = {Special polygons for subgroups of the modular group and
              applications},
   JOURNAL = {Internat. J. Math.},
  FJOURNAL = {International Journal of Mathematics},
    VOLUME = {4},
      YEAR = {1993},
    NUMBER = {1},
     PAGES = {11--34},
      ISSN = {0129-167X},
   MRCLASS = {11F06 (20H05)},
  MRNUMBER = {MR1209958 (94j:11045)},
MRREVIEWER = {Marvin I. Knopp},
}
		

@article {Kulkarni,
    AUTHOR = {Kulkarni, Ravi S.},
     TITLE = {An arithmetic-geometric method in the study of the subgroups
              of the modular group},
   JOURNAL = {Amer. J. Math.},
  FJOURNAL = {American Journal of Mathematics},
    VOLUME = {113},
      YEAR = {1991},
    NUMBER = {6},
     PAGES = {1053--1133},
      ISSN = {0002-9327},
     CODEN = {AJMAAN},
   MRCLASS = {11F06},
  MRNUMBER = {MR1137534 (92i:11046)},
MRREVIEWER = {Harvey Cohn},
}


@article {DoJeKo,
    AUTHOR = {Dooms, Ann and Jespers, Eric and Konovalov, Alexander},
     TITLE = {From Farey symbols to generators for subgroups of finite index in integral group rings of finite groups},
   JOURNAL = {Journal of K-Theory},
    VOLUME = {6},
      YEAR = {2010},
    NUMBER = {2},
     PAGES = {263–283},
}

		
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