R. Karimpour, и G. Ruhe. Proceedings of the Companion Publication of the 2015 Annual Conference on Genetic and Evolutionary Computation, стр. 1415--1416. New York, NY, USA, ACM, (2015)
R. Berntsson Svensson, и B. Regnell. Requirements Engineering: Foundation for Software Quality, том 9013 из Lecture Notes in Computer Science, Springer International Publishing, (2015)