Iridescent phenomena in Morpho cypris and Greta oto butterfly wings: a physics point view - Barrera-Patiño, C. P.; Vollet Filho, José Dirceu; Rosa, Ramon Gabriel Teixeira; Inada, Natalia Mayumi; Bagnato, Vanderlei Salvador; Rey-González, R. R. (São Paulo School of Advanced Science on Modern Topics in Biophotonics, 2019)