@article{1138845343, author = {Shiohama, Katsuhiro}, title = {Surfaces of curvatures $\l ambda =\mu =0$ in $E^{4}$}, journal = {Kodai Math. Sem. Rep.}, volume = {19}, number = {1}, year = {1967}, pages = { 75-79}, language = {en}, url = {http://dml.mathdoc.fr/item/1138845343} }
Shiohama, Katsuhiro. Surfaces of curvatures $łambda =\mu =0$ in $E^{4}$. Kodai Math. Sem. Rep., Tome 19 (1967) no. 1, pp. 75-79. http://gdmltest.u-ga.fr/item/1138845343/