DUBROVINA, Nadežda Anatoljevna et al. Exploring the Nexus between Tax Revenue Trends and Social Contributions Development in European Union Countries. - Registrovaný: Web of Science. In Financial and Credit Activity: Problems of Theory and Practice. - Kharkiv : Kharkiv institute SHEI. ISSN 2306-4994, 2019, vol. 2, no. 29, pp. 498-508 online.