Mendelová, A., Ľubomír Mendel, M. Fikselová, and P. Czako. “Evaluation of Anthocynin Changes in Blueberries and in Blueberry Jam After the Processing and Storage”. Potravinarstvo Slovak Journal of Food Sciences, Vol. 7, no. 1, July 2013, pp. 130-5, doi:10.5219/293.