TY - JOUR AU - W. Marek TI - Some comments on the paper by Artigue, Isambert, Perrin and Zalc JO - Fundamenta Mathematicae PY - 1978 SP - 227 EP - 228 VL - 101 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/fm-101-3-227-228/ DO - 10.4064/fm-101-3-227-228 LA - en ID - 10_4064_fm_101_3_227_228 ER -