CHEMICAL PHYSICS LETTERS, vol. 216, no. 3-6, page. 309 - 312, 1993-12-31
JOURNAL OF CHEMICAL PHYSICS, vol. 102, no. 2, page. 839 - 849, 1995-01-08
CHEMICAL PHYSICS LETTERS, vol. 197, no. 1-2, page. 77 - 80, 1992-09-04