T. Berger, R. Rublack, D. Nair, J. M. Atlee, M. Becker et al., A survey of variability modeling in industrial practice, Proc. of the 7th Int. Workshop on Variability Modelling of Software-intensive Systems, vol.7, pp.1-7, 2013.
DOI : 10.1145/2430502.2430513

B. Ganter and S. O. Kuznetsov, Pattern Structures and Their Projections, Proc. of the 9th Int. Conf. on Conceptual Structures, pp.129-142, 2001.
DOI : 10.1007/3-540-44583-8_10

URL : http://www.math.tu-dresden.de/~ganter/psfiles/kuznet.ps

C. W. Krueger, Easing the Transition to Software Mass Customization, Proc. of the 4th Int. Workshop on Software Product-Family Engineering, pp.282-293, 2001.
DOI : 10.1007/3-540-47833-7_25

K. Pohl, G. Böckle, and F. J. Van-der-linden, Software Product Line Engineering: Foundations, Principles, and Techniques, 2005.

U. Ryssel, J. Ploennigs, and K. Kabitzsch, Extraction of feature models from formal contexts, the 15th Int. Conf. on Software Product Lines, vol.2, pp.1-4, 2011.
DOI : 10.1145/2019136.2019141