Preparation, investigation and studying the (physical, spectral and biological activity) of new monomers and heterocyclic compounds containing nitrogen and oxygen . Periodicals of Engineering and Natural Sciences, [S. l.], v. 11, n. 2, p. 284–296, 2023. DOI: 10.21533/pen.v11.i2.119. Disponível em: https://pen.ius.edu.ba/index.php/pen/article/view/119. Acesso em: 13 may. 2026.