Hidas, K. I., A. Tóth, E. Hamar, I. Jakab, L. Friedrich, and C. Németh. “Effect of Cryogenic Freezing on the Textural and Sensoric Properties of Donuts”. Review on Agriculture and Rural Development, vol. 8, no. 1-2, May 2020, pp. 29-34, doi:10.14232/rard.2019.1-2.29-34.