@incollection{AST_1980__75-76__57_0, author = {Byrnes, Christopher I.}, title = {On certain problems of arithmetic arising in the realization of linear systems with symmetries}, booktitle = {Analyse des syst\`emes}, author = {Collectif}, series = {Ast\'erisque}, publisher = {Soci\'et\'e math\'ematique de France}, number = {75-76}, year = {1980}, zbl = {0458.93015}, mrnumber = {581702}, language = {en}, url = {http://archive.numdam.org/item/AST_1980__75-76__57_0/} }