Cohn, Richard M. Inversive difference fields. (English) Zbl 0033.17903 Bull. Am. Math. Soc. 55, 597-603 (1949). × Cite Format Result Cite Review PDF Full Text: DOI
Cohn, Richard M. A theorem of difference polynomials. (English) Zbl 0033.17902 Bull. Am. Math. Soc. 55, 595-597 (1949). × Cite Format Result Cite Review PDF Full Text: DOI