@article{01780261, title = {Approximate controllability of neutral functional differential system with unbounded delay.}, journal = {International Journal of Mathematics and Mathematical Sciences}, volume = {25}, year = {2001}, pages = {737-744}, doi = {10.1155/S016117120100597X}, zbl = {0995.93009}, language = {en}, url = {http://dml.mathdoc.fr/item/01780261} }
Park, Jong Yeoul; Kang, Sang Nam. Approximate controllability of neutral functional differential system with unbounded delay.. International Journal of Mathematics and Mathematical Sciences, Tome 25 (2001) pp. 737-744. doi : 10.1155/S016117120100597X. http://gdmltest.u-ga.fr/item/01780261/