J. Martinez, J.‑S. Sottet, A. García Frey, T. Ziadi, T. Bissyandé, J. Vanderdonckt, J. Klein, Y. Le Traon : “Variability Management and Assessment for User Interface Design”, chapter in Human Centered Software Product Lines, vol. 89 (9), Human–Computer Interaction Series, pp. 81-106, (Springer) [Martinez 2017a]