Ковальчик, Ю. І., С. Й. Ковалишин, and В. О. Тимочко. “Approaches to the Use of Markov Random Processes in Mathematical Models of Project Management Harvesting of Agricultural Products”. Eastern-European Journal of Enterprise Technologies, vol. 1, no. 5(49), Jan. 2012, pp. 57-59, doi:10.15587/1729-4061.2011.2364.