@article{Yagubov_2010 author = {Mamed Akhverdy ogly Yagubov and Natavan Shukyur kyzy Asadova}, title = {On Relation between Sets of Solutions of the Main and Extended Problems for Control Problems in Elliptic Equations }, journal = {Journal of Automation and Information Sciences}, issn = {1064-2315}, year = {2010}, volume = {42}, number = {7}, pages = {43--53} }