JUN, Sunghae; JOO LEE, Seung. Scientific and industrial keyword analysis using structured covariance and clustering. International Journal of Engineering & Technology, [S. l.], v. 7, n. 3, p. 1501–1503, 2018. DOI: 10.14419/ijet.v7i3.12487. Disponível em: https://www.sciencepubco.com/index.php/ijet/article/view/12487.. Acesso em: 3 may. 2024.