TY - JOUR AU - A. Zięba TI - Remarks on the ambiguity of distance determination in Friedmann's cosmological model JO - Applicationes Mathematicae PY - 1971 SP - 181 EP - 185 VL - 12 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/am-12-2-181-185/ DO - 10.4064/am-12-2-181-185 LA - en ID - 10_4064_am_12_2_181_185 ER -