@article{urn:eudml:doc:42094, title = {An optimal control problem for Helmholtz equation with non-local boundary conditions and quadratic funtional}, journal = {Revista de la Real Academia de Ciencias Exactas F\'\i sicas y Naturales}, volume = {91}, year = {1997}, pages = {65-69}, zbl = {0907.49013}, language = {en}, url = {http://dml.mathdoc.fr/item/urn:eudml:doc:42094} }
Criado, Francisco; Meladze, Gamlet; Odisehlidze, Nana. An optimal control problem for Helmholtz equation with non-local boundary conditions and quadratic funtional. Revista de la Real Academia de Ciencias Exactas Físicas y Naturales, Tome 91 (1997) pp. 65-69. http://gdmltest.u-ga.fr/item/urn:eudml:doc:42094/