1. V. P. Golubyatnikov, ?On rings of bordisms with split normal bundles,? Usp. Mat. Nauk,34, No. 6, 150?154 (1979).
2. V. P. Golubyatnikov, ?On a theory of cobordisms,? Sib. Mat. Zh.,20, No. 2, 263?269 (1979).
3. V. P. Golubyatnikov, ?On an algebraic spectral sequence,? Sib. Mat. Zh.,21, No. 1, 202?207 (1980).
4. J. C. Alexander, ?Unitary approximations to framed bordism,? Boll. Sociedad Mat. Mexicana,20, No. 1, 1?5 (1975).
5. A. Szücs, ?A universal ?1,1-singular map and cobordism groups of immersions,? Math. Proc. Cambridge Phil. Soc.,103, No. 1, 89?95 (1988).