Melvin Henriksen, A Simple Characterization of Commutative Rings without Maximal Ideals, The American Mathematical Monthly, Vol. 82, No. 5 (May, 1975), pp. 502-505 ...

J. L. Burchnall, T. W. Chaundy, Commutative Ordinary Differential Operators, Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character, Vol. 118, ...

NEITHER Dr. Hilbert nor the reviewer make any suggestion that the commutative law of addition is best proved as a deduction from the laws of multiplication. But the laws of multiplication are so ...