@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/}
}