[1] L. Pursell, S. Y. Trimble. Gram-Schmidt Orthogonalization by Gauss Elimination, Amer. Math. Monthly, 98 (6): 544–549, 1991.
[2] L. E. Blumenson. A Derivation of n-Dimensional Spherical Coordinates, Amer. Math. Monthly, 67 (1): 63–66, doi:10.2307/2308932. JSTOR 2308932, 1960.

应该是学术性的。