참고문헌
- H. Matsumura, Commutative algebra, Benjamin, 1970 (second edn. 1980).
- H. Matsumura, Commutative Ring Theory, Cambridge Univ., 1989.
- M. F. Atiyah and I. G. Macdonal, Introduction to commutative algebra.
- T. Kimura and H. Niitsma, Differential basis and p-basis of a regular local ring, Proc. Amer. Math. Soc. 92 (1984), no. 3, 335-338.
- Crupi and Marilena, Free modules of differentials and p-basis, Atti Sem. Mat. Fis. Univ. Modena 42 (1984), no. 1, 141-157.
- L. CHiantini, p-basi e basi differenziali di un anello, Rend. Univ. Pol. 37 (1979), no. 2, 103-121.