1. Lehman, M.M., Ramil, J.F., Wernick, P.D., Perry, D.E., and Turski, W.M., Metrics and laws of software evolution-the nineties view, Proc. 4th Int. Software Metrics Symp., Albuquerque, NM, 1997, pp. 20–32.
2. Almeyda, S. and Dávila, A., Process improvement in software requirements engineering: A systematic mapping study, Program. Comput. Software, 2022, vol. 48, pp. 513–533.
3. ISO/IEC no. 14764: Software Engineering–Software Life Cycle Processes–Maintenance, International Organization for Standardization, 2006(E).
4. Tripathy, P. and Naik, K., Software Evolution and Maintenance: A Practioner’s Approach, John Wiley and Sons Inc., 2015, p. 393.
5. Chidamber, S.R. and Kemerer, C.F., Towards a metrics suite for object oriented design, in Proc. OOPSLA’91 Conf. on Object-Oriented Programming Systems, Languages, and Applications, Phoenix: ACM Digital Library, 1991, pp. 197–211.