@article{10_4064_am_12_2_181_185, author = {A. Zi\k{e}ba}, title = {Remarks on the ambiguity of distance determination in {Friedmann's} cosmological model}, journal = {Applicationes Mathematicae}, pages = {181--185}, publisher = {mathdoc}, volume = {12}, number = {2}, year = {1971}, doi = {10.4064/am-12-2-181-185}, zbl = {0228.53049}, language = {en}, url = {http://geodesic.mathdoc.fr/articles/10.4064/am-12-2-181-185/} }