Erratum to “Ľubomír Vančo, Magdaléna Kadlečíková, Juraj Breza, Pavol Michniak, Michal Čeppan, Milena Reháková, Eva Belányiová, Beata Butvinová: Differentiation of selected blue writing inks by surface-enhanced Raman spectroscopy”, Chemical Papers 69 (4) 518–526 (2015)