El Shal, A. M., P. Riczu, A. Nagy, E. Sulyok, Z. Szabó, and J. Nyéki. “The Effect of Storage to Optical Properties in Case of Two Apple Fruit Varieties”. International Journal of Horticultural Science, Vol. 18, no. 2, July 2016, pp. 33-36., doi:10.31421/IJHS/18/2/1029.