Retracts of polynomial rings
Tài liệu tham khảo
Abhyankar, 1972, On the uniqueness of the coefficient ring in a polynomial ring, J. Algebra, 23, 310, 10.1016/0021-8693(72)90134-2
Brewer, 1972, Isomorphic polynomial rings, Arch. Math., 23, 484, 10.1007/BF01304919
Eakin, 1972, A Cancellation Problem for Rings, 61
Hamann, 1973, On the R-invariance of R[X]
Kaplansky, 1970