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@article{AM2_1981__22_136868, author = {Klaus Vedder and Henda Swart}, title = {Subplane replacement in projective planes.}, journal = {Aequationes mathematicae}, pages = {134--139}, publisher = {mathdoc}, volume = {22}, year = {1981}, zbl = {0481.51009}, url = {http://geodesic.mathdoc.fr/item/AM2_1981__22_136868/} }
Klaus Vedder; Henda Swart. Subplane replacement in projective planes.. Aequationes mathematicae, Tome 22 (1981), pp. 134-139. http://geodesic.mathdoc.fr/item/AM2_1981__22_136868/