1. L. Máca, B. Leitner, Operational analysis 1, University of Žilina, Slovakia, EDIS. 2002.
2. Quality evaluation, Technical University in Ostrava, Available from Internet: http://kds.vsb.cz/mhd/kvalita-vahy.htm.
3. V. Jandová, AHP – strengths and weaknesses, University of Palacký in Olomouc, Czech Republic, diploma thesis. 2012.
4. L. Bartuška, L. Černá, J. Daniš, Costs comparison and the possibilities of increasing the transport capacity with a selection of the appropriate Railway wagons, Naše more – Our Sea 63(3) (2016) 93-97. ISSN 0469-6255.
5. J. Sekulová, I. Nedeliak, Utilization of GAP model in providing of services in the railway freight transport, Perner's Contacts, 8th ed. Vol. 4, pp. 67-75. 2013.