[1] G. Pickert: Projective Ebenen. Berlin-Göttingen-Heidelberg 1955.
[2] K. Schütte: 
Schließungssätze füг orthogonale Abbildungen euklidischer Ebenen. Math. Ann. 152 (1956), 106-120. 
MR 0083738[3] V. Havel: К тeopии пoлyaвтoмopфизмoв aлтepнaтивныx тeл. Czech. Math. J. 12 (87) 1962, 110-117.
[4] M. Smilley: 
Von Staudt projectivities of Moufang planes. Algebr. and topological foundations of geometry. Oxford-London-N. York-Paris 1962, 165-166. 
MR 0139996[5] N. Jacobson: 
Composition algebras and theiг automorphisms. Rend. Circ. Mat. Palermo, 7 (serie2) 1958,55-80. 
MR 0101253