Pazin, Maicon G.; Allian, Ana P.; OliveiraJr, Edson: 'Empirical study on software process variability modelling with SMartySPEM and vSPEM', IET Software, 2018, 12, (6), p. 536-546, DOI: 10.1049/iet-sen.2017.0061
IET Digital Library, https://digital-library.theiet.org/;jsessionid=21phwawiq4i6r.x-iet-live-01content/journals/10.1049/iet-sen.2017.0061