MIKHALEVICH, Alexander (zost.). Journal of international scientific publications : Materials, methods and technologies [elektronický zdroj]. 16. 1st. ed. Bourgas : Science & Education Foundation, 2022. 362 s. Dostupné na internete: <https://www.scientific-publications.net/en/open-access-journals/materials-methods-and-technologies/> ISSN 1314-7269.