RAVALISON, F. A.; RABENJA, N. Using Patent Statistics and Principal Component Analysis to Predict Global Competition. International Journal of Industrial Engineering and Management, [S. l.], v. 2, n. 2, p. 45–50, 2011. DOI: 10.24867/IJIEM-2011-2-107. Disponível em: http://sp.ftn.uns.ac.rs/index.php/ijiem/article/view/358. Acesso em: 15 nov. 2024.