„THE BAR CODES AND THE TECHNOLOGY OF CARGO TRANSPORT SYSTEMS FOR PACKETS AND SMALL INDIVIDUAL PACKAGES IN THE CZECH REPUBLIC" (2009) Perner’s Contacts, 4(4), s. 78–83. Dostupné z: https://pernerscontacts.upce.cz/index.php/perner/article/view/1185 (Viděno: 5 březen 2026).