NOVOTNÁ, Michaela; GOTTWALD, Dalibor. Current Challenges for the Postal Services Sector in the Context of E-Commerce – Predictive Analysis of V4 States. Promet - Traffic&Transportation, [S. l.], v. 33, n. 6, p. 919–930, 2021. DOI: 10.7307/ptt.v33i6.3927. Disponível em: https://traffic2.fpz.hr/index.php/PROMTT/article/view/2976. Acesso em: 26 aug. 2025.