Stray-light induced artefacts in absorption spectra of crystalline oligothiophenes A. Sassella, A. Borghesi, P. Spearman and S. Tavazzi Eur. Phys. J. B, 28 4 (2002) 385-388 Published online: 13 August 2002 DOI: 10.1140/epjb/e2002-00241-7