We give a complete classification of surfaces with parallel second fundamental form in 3-dimensional Bianchi-Cartan-Vranceanu spaces.
@article{bwmeta1.element.bwnjournal-article-doi-10_4064-bc57-0-5, author = {Mohamed Belkhelfa and Franki Dillen and Jun-ichi Inoguchi}, title = {Surfaces with parallel second fundamental form in Bianchi-Cartan-Vranceanu spaces}, journal = {Banach Center Publications}, volume = {58}, year = {2002}, pages = {67-87}, zbl = {1029.53071}, language = {en}, url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-bc57-0-5} }
Mohamed Belkhelfa; Franki Dillen; Jun-ichi Inoguchi. Surfaces with parallel second fundamental form in Bianchi-Cartan-Vranceanu spaces. Banach Center Publications, Tome 58 (2002) pp. 67-87. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-bc57-0-5/