Zapata J., Carlos M., et al. “UNC-Corpus: A UML-Diagram Corpus to Solve Completeness Problems in Software Engineering”. Revista Universidad EAFIT, vol. 44, no. 151, Mar. 2011, pp. 93-106, https://publicaciones.eafit.edu.co/index.php/revista-universidad-eafit/article/view/133.