Voir la notice de l'article provenant de la source Math-Net.Ru
@article{MZM_2001_69_2_a15, author = {E. V. Zhuzhoma and V. S. Medvedev}, title = {The {Closure} {Lemma} for {Piecewise} {Diffeomorphic} {Maps} of the {Circle}}, journal = {Matemati\v{c}eskie zametki}, pages = {310--313}, publisher = {mathdoc}, volume = {69}, number = {2}, year = {2001}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_2001_69_2_a15/} }
E. V. Zhuzhoma; V. S. Medvedev. The Closure Lemma for Piecewise Diffeomorphic Maps of the Circle. Matematičeskie zametki, Tome 69 (2001) no. 2, pp. 310-313. http://geodesic.mathdoc.fr/item/MZM_2001_69_2_a15/