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@article{AM2_1977__16_136678, author = {V. Hiris and M. Megan}, title = {Controllability of linear systems and a boundary value problem.}, journal = {Aequationes mathematicae}, pages = {81--92}, publisher = {mathdoc}, volume = {16}, year = {1977}, zbl = {0385.93006}, url = {http://geodesic.mathdoc.fr/item/AM2_1977__16_136678/} }
V. Hiris; M. Megan. Controllability of linear systems and a boundary value problem.. Aequationes mathematicae, Tome 16 (1977), pp. 81-92. http://geodesic.mathdoc.fr/item/AM2_1977__16_136678/