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Journal of molecular spectroscopy, ISSN: 0022-2852, 157 (1), 1993, p. 248-253
 
Journal of molecular spectroscopy, ISSN: 0022-2852, 156 (2), 1992, p. 403-414
 
Journal of molecular spectroscopy, ISSN: 0022-2852, 155 (1), 1992, p. 84-104
 
Journal of molecular spectroscopy, ISSN: 0022-2852, 149 (2), 1991, p. 425-434