M. W. Garrett, Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character, Vol. 112, No. 761 (Sep. 1, 1926), pp. 391-406.
M. W. Garrett, Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character, Vol. 112, No. 761 (Sep. 1, 1926), pp. 391-406.