@article{AM2_1978__18_136770,
     author = {N.L. Johnson},
     title = {A note on the derived semifield planes of order 16.},
     journal = {Aequationes mathematicae},
     pages = {103--111},
     publisher = {mathdoc},
     volume = {18},
     year = {1978},
     zbl = {0391.51004},
     url = {http://geodesic.mathdoc.fr/item/AM2_1978__18_136770/}
}