1. C. Arf,
Untersuchungen über quadratische Formen in Körpern der Charakteristik 2. I,
J. Reine Angew. Math. 183 (1941), 148–167.
2. E. Artin, C. J. Nesbitt and R. M. Thrall,
Rings with Minimum Condition,
Univ. Michigan Publ. Math. 1,
University of Michigan, Ann Arbor, 1944.
3. R. Baer,
Linear Algebra and Projective Geometry,
Academic Press, New York, 1952.
4. A. Blunck, N. Knarr, B. Stroppel and M. J. Stroppel,
Clifford parallelisms defined by octonions,
Monatsh. Math. (2018), 10.1007/s00605-017-1115-1.
5. P. Dembowski,
Finite Geometries,
Ergeb. Math. Grenzgeb. 44,
Springer, Berlin, 1968.