@article{10_4064_fm_101_3_227_228, author = {W. Marek}, title = {Some comments on the paper by {Artigue,} {Isambert,} {Perrin} and {Zalc}}, journal = {Fundamenta Mathematicae}, pages = {227--228}, publisher = {mathdoc}, volume = {101}, number = {3}, year = {1978}, doi = {10.4064/fm-101-3-227-228}, language = {en}, url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-101-3-227-228/} }