@article{hal-00003272, author = {Kolev, Boris}, title = {Periodic orbits of period 3 in the disc}, journal = {HAL}, volume = {1994}, number = {0}, year = {1994}, language = {en}, url = {http://dml.mathdoc.fr/item/hal-00003272} }
Kolev, Boris. Periodic orbits of period 3 in the disc. HAL, Tome 1994 (1994) no. 0, . http://gdmltest.u-ga.fr/item/hal-00003272/