L. Capretz and P. Lee.
" A Classification of Object-Oriented Development Methodologies", in <em>Proceedings of the 6th Brazilian Symposium on Software Engineering</em>, Gramado/RS, 1992, pp. 129-141, doi: <a href="https://doi.org/10.5753/sbes.1992.25179">https://doi.org/10.5753/sbes.1992.25179</a>.