@article{10_21136_MB_1991_126197, author = {Gozdalska, Krystyna}, title = {On affine planes non-extensible to {Laguerre} planes and some related problems}, journal = {Mathematica Bohemica}, pages = {2--11}, publisher = {mathdoc}, volume = {116}, number = {1}, year = {1991}, doi = {10.21136/MB.1991.126197}, mrnumber = {1100422}, zbl = {0721.51006}, language = {en}, url = {http://geodesic.mathdoc.fr/articles/10.21136/MB.1991.126197/} }