@article{05849023, title = {Controllability of second-order equations in }, journal = {Mathematical Problems in Engineering}, volume = {2010}, year = {2010}, doi = {10.1155/2010/147195}, zbl = {1222.93031}, language = {en}, url = {http://dml.mathdoc.fr/item/05849023} }
Leiva, Hugo; Merentes, Nelson. Controllability of second-order equations in . Mathematical Problems in Engineering, Tome 2010 (2010) . doi : 10.1155/2010/147195. http://gdmltest.u-ga.fr/item/05849023/