LASHEVA, Veska; TODOROVA, Dimitrina; YAVOROV, Nikolay; IVANOVA, Kalina; TSVETANSKA, Iskra. INVESTIGATION OF THE AGING OF BOOKS. KNOWLEDGE - International Journal , [S. l.], v. 48, n. 2, p. 327–333, 2021. Disponível em: https://ojs.ikm.mk/index.php/kij/article/view/4746. Acesso em: 1 may. 2026.