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@article{AM2_1977__16_136713, author = {N.L. Johnson}, title = {A note on the derived semifiled planes of order 16. {(Short} {Communication).}}, journal = {Aequationes mathematicae}, pages = {319--319}, publisher = {mathdoc}, volume = {16}, year = {1977}, url = {http://geodesic.mathdoc.fr/item/AM2_1977__16_136713/} }
N.L. Johnson. A note on the derived semifiled planes of order 16. (Short Communication).. Aequationes mathematicae, Tome 16 (1977), p. 319. http://geodesic.mathdoc.fr/item/AM2_1977__16_136713/