Structural, electrical, electronic and optical properties of melanin filmsM. Abbas, F. D’Amico, L. Morresi, N. Pinto, M. Ficcadenti, R. Natali, L. Ottaviano, M. Passacantando, M. Cuccioloni, M. Angeletti and R. GunnellaEur. Phys. J. E, 28 3 (2009) 285-291DOI: https://doi.org/10.1140/epje/i2008-10437-9