1. Goldratt, E., 1990. What is this thing called Theory of Constrains and how should it be implemented?, North River Press, New York.
2. Hamrol, A., 2017. Management and quality engineering, PWN, Warsaw. (in: Polish).
3. Hamrol, A., 2018. Strategies and practices of efficient operation. Lean Six Sigma and others, PWN, Warsaw. (in: Polish).
4. Tomkowiak, A., Koliński A., 2010. Elimination of bottlenecks as a tool to optimize production costs, Gospodarka Materiałowa i Logistyka, 10, 20–26. (in: Polish).
5. Mabin, V.J., Balderstone, S.J., 2000. The World of the Theory of Constraints: A Review of the International Literature, St. Lucie Press, Boca Raton.