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The classification of the translation planes of order 16, I. Geometriae Dedicate 15 (1983), 137 - 153
MR 0737954
[3] H. Luneburg:
Translation Planes. Berlin - Heidelberg - New York 1980
MR 0572791
[4] T. G. Room P. B. Kirkpatrick: Miniquaternion Geometry. Cambridge, 1971