1. C. M. Ablow and D. J. Kaylor, “Inconsistent homogeneous linear inequalities, Bull. Am. Math. Soc. 71 (5), 724 (1965).
2. H. G. Barrow, A. P. Ambler, and R. M. Burstall, “Some techniques for recognizing structures in pictures,” in Proc. Int. Conf. on Frontiers of Pattern Recognition, Ed. by Satosi Watanabe (Academ. Press, New York, London, 1972), pp. 1–30.
3. G. Birkhoff and J. D. Lipson, “Heterogeneous algebras,” J. Combinat. Theory 8, 115–133 (1970).
4. V. M. Chernov, “Clifford algebras are group algebras projections,” in Advanches in Geometric Algebra with Applications in Science and Engineering, Ed. by E. Bayro-Corrochano and G. Sobczyk (Birkhauser, Boston, 2001), pp. 467–482.
5. V. M. Chernov, “On defining equations for the elements of associative and commutative algebras,” in Space-Time Structure. Algebra and Geometry, Ed. by D. Pavlov, Gh. Atanasiu, and V. Balan (Lilia Print, 2007), pp. 182–188.