KLJUČNIKOV, Aleksandr - KOZUBÍKOVÁ, Ludmila - SOPKOVÁ, Gabriela. The Payment Discipline of Small and Medium-sized Enterprises. - Registrovaný: Web of Science, Registrovaný: Scopus. In Journal of Competitiveness : scientific journal from the field of management and economics. - Zlín : Fakulta managementu a ekonomiky Univerzity Tomáše Bati ve Zlíně, 2017. ISSN 1804-1728, Jun 2017, no. 2, s. 45-61 online.