@article{PMIHES_1990__71__5_0,
     author = {Atsushi Katsuda and Toshikazu Sunada},
     title = {Closed orbits in homology classes},
     journal = {Publications Math\'ematiques de l'IH\'ES},
     pages = {5--32},
     year = {1990},
     publisher = {Institut des Hautes \'Etudes Scientifiques},
     volume = {71},
     doi = {10.1007/BF02699875},
     mrnumber = {1079641},
     zbl = {0728.58026},
     language = {en},
     url = {https://pmihes.centre-mersenne.org/articles/10.1007/BF02699875/}
}