JOURNAL OF CHEMICAL PHYSICS, vol. 97, no. 4, page. 2536 - 2547, 1992-08-15
TOPICS IN APPLIED PHYSICS, vol. 70, page. 57 - 76, 1992-01
JOURNAL OF CHEMICAL PHYSICS, vol. 101, no. 8, page. 6615 - 6624, 1994-10-15