@article{105332, author = {Franti\v sek Charv\'at}, title = {On problems concerning extension of linear operations on linear spaces}, journal = {Commentationes Mathematicae Universitatis Carolinae}, volume = {012}, year = {1971}, pages = {105-115}, zbl = {0232.47013}, mrnumber = {0298391}, language = {en}, url = {http://dml.mathdoc.fr/item/105332} }
Charvát, František. On problems concerning extension of linear operations on linear spaces. Commentationes Mathematicae Universitatis Carolinae, Tome 012 (1971) pp. 105-115. http://gdmltest.u-ga.fr/item/105332/
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