Two-photon absorption of Tl1-xIn1-xSnxSe2 nanocrystallitesGalyna Myronchuk, Oleg Parasyuk, Ludmila Piskach, Nasser Saleh Alzayed, Serhii Prokhorenko, Michal Piasecki and Iwan KitykEPJ Web Conf., 133 (2017) 03001DOI: https://doi.org/10.1051/epjconf/201713303001