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