Törnqvist M, Fred C, Haglund J, Helleberg H, Paulsson B, Rydberg P
Department of Environmental Chemistry, Stockholm University, S-106 91 Stockholm, Sweden.
J Chromatogr B Analyt Technol Biomed Life Sci. 2002 Oct 5;778(1-2):279-308. doi: 10.1016/s1570-0232(02)00172-1.