@article{02238183, title = {Time-like isothermic surfaces associated to Grassmannian systems.}, journal = {Documenta Mathematica}, volume = {10}, year = {2005}, pages = {527-549}, zbl = {1084.53045}, language = {en}, url = {http://dml.mathdoc.fr/item/02238183} }
Dussan, M.P.; Magid, M.A. Time-like isothermic surfaces associated to Grassmannian systems.. Documenta Mathematica, Tome 10 (2005) pp. 527-549. http://gdmltest.u-ga.fr/item/02238183/