@article{ASNSP_1978_4_5_3_567_0, author = {Littman, Walter}, title = {Boundary control theory for hyperbolic and parabolic partial differential equations with constant coefficients}, journal = {Annali della Scuola Normale Superiore di Pisa - Classe di Scienze}, pages = {567--580}, publisher = {Scuola normale superiore}, volume = {Ser. 4, 5}, number = {3}, year = {1978}, mrnumber = {507002}, zbl = {0395.35007}, language = {en}, url = {http://www.numdam.org./item/ASNSP_1978_4_5_3_567_0/} }