[1] Ctr Estudios Ambientales Cienfuegos, E-28040 Cienfuegos, Cuba
[2] CIEMAT, Madrid 8200, Spain
[3] Univ Nacl Autonoma Mexico, ICML, A-1400 Mazatlan, Mexico
[4] IAEA, Dept Tech Cooperat, MC-98000 Vienna, Austria
[5] IAEA, Marine Environm Labs, Monaco, Monaco