Villegas Ramírez ML, Collazos CA, Giraldo WJ, González JM. Towards an activity taxonomy (ATx) from separation of concerns in use case modeling. rev.ing.univ.Medellin [Internet]. 2017May10 [cited 2024Apr.27];16(30):97-114. Available from: https://revistas.udem.edu.co/index.php/ingenierias/article/view/1214