@article{05031292,
title = {Symmetry groups and Lagrangians associated with Tzitzeica surfaces.},
journal = {Balkan Journal of Geometry and its Applications (BJGA)},
volume = {10},
year = {2005},
pages = {73-91},
zbl = {1091.58012},
language = {en},
url = {http://dml.mathdoc.fr/item/05031292}
}
Bîlă, Nicoleta. Symmetry groups and Lagrangians associated with Tzitzeica surfaces.. Balkan Journal of Geometry and its Applications (BJGA), Tome 10 (2005) pp. 73-91. http://gdmltest.u-ga.fr/item/05031292/