1. M. Barr and C. Wells, Toposes, Triples, and Theories, Springer, New York (1985), 345 pp.
2. A. V. Arkhangel'skii, Topological Spaces of Functions [in Russian], Izd-vo Mosk. Un-ta, Moscow (1989), 224 pp.
3. A. Ch. Chigogidze, ?On the extension of normal functors,? Vestn. Mosk. Un-ta. Ser. Matem., No. 6, 23?26 (1984).
4. E. V. Shchepin, ?Functors and odd powers of compacta,? Usp. Mat. Nauk,36, No. 3, 3?62 (1981).
5. M. M. Zarichnyy, ?Multiplicative normal power functor,? Mat. Zametki,41, No. 1, 93?100 (1987).