Voir la notice de l'article provenant de la source Math-Net.Ru
@article{MZM_1969_5_5_a9, author = {H. Zieschang}, title = {On toric fiberings over surfaces}, journal = {Matemati\v{c}eskie zametki}, pages = {569--576}, publisher = {mathdoc}, volume = {5}, number = {5}, year = {1969}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/MZM_1969_5_5_a9/} }
H. Zieschang. On toric fiberings over surfaces. Matematičeskie zametki, Tome 5 (1969) no. 5, pp. 569-576. http://geodesic.mathdoc.fr/item/MZM_1969_5_5_a9/