MEREZHKO Н.; TERNOVA А.; SIRENKO С. Ballpoint pen market in Ukraine. INTERNATIONAL SCIENTIFIC-PRACTICAL JOURNAL COMMODITIES AND MARKETS, [S. l.], v. 24, n. 2, p. 96–103, 2017. Disponível em: https://journals.knute.edu.ua/commodities-and-markets/article/view/1187. Acesso em: 20 apr. 2025.