Effect of Merocyanine 540 on Langmuir-Blodgett films and liposomes of zwitterionic, anionic and cationic lipid composition M. Alay, J. Prat, M.A. Alsina and M.A. Busquets J. Phys. IV France, 113 (2004) 3-6 DOI: 10.1051/jp4:20040001