@article{1178227989, author = {Roussos, Ioannis M.}, title = {The helicoidal surfaces as Bonnet surfaces}, journal = {Tohoku Math. J. (2)}, volume = {40}, number = {4}, year = {1988}, pages = { 485-490}, language = {en}, url = {http://dml.mathdoc.fr/item/1178227989} }
Roussos, Ioannis M. The helicoidal surfaces as Bonnet surfaces. Tohoku Math. J. (2), Tome 40 (1988) no. 4, pp. 485-490. http://gdmltest.u-ga.fr/item/1178227989/