Liposomes modified by mono- and bis-phthalocyanines: A comprehensive EPR study Dariusz Man, Rudolf Słota, Anna Kawecka, Grzegorz Engel and Gabriela Dyrda Eur. Phys. J. E, 40 6 (2017) 63 Published online: 19 June 2017 DOI: 10.1140/epje/i2017-11550-4