Erratum to: Spectral features of conjugated bichromophores: porphyrins with curcumin Aleksandr Starukhin, Aleksander Gorski, Tatsiana Pavich and Valerii Kniukshto EPJ Web Conf., 190 (2018) 04026 Published online: 01 May 2019 DOI: 10.1051/epjconf/201819004026