@article{TSG_1992-1993__11__73_0,
     author = {Kolev, Boris},
     title = {Type de tresse d'orbites p\'eriodiques},
     journal = {S\'eminaire de th\'eorie spectrale et g\'eom\'etrie},
     pages = {73--84},
     publisher = {Institut Fourier},
     address = {Grenoble},
     volume = {11},
     year = {1992-1993},
     mrnumber = {1715944},
     zbl = {0909.58024},
     language = {fr},
     url = {http://archive.numdam.org/item/TSG_1992-1993__11__73_0/}
}