@article{01433465, title = {Extrema constrained by }, journal = {Balkan Journal of Geometry and its Applications (BJGA)}, volume = {4}, year = {1999}, pages = {45-52}, zbl = {0990.90111}, language = {en}, url = {http://dml.mathdoc.fr/item/01433465} }
Dogaru, Oltin; Dogaru, Vlad. Extrema constrained by . Balkan Journal of Geometry and its Applications (BJGA), Tome 4 (1999) pp. 45-52. http://gdmltest.u-ga.fr/item/01433465/