@article{IJAMCS_2002_12_2_a14,
     author = {Robak, S. and Franczyk, B. and Politowicz, K.},
     title = {Extending the {UML} for modelling variability for system families},
     journal = {International Journal of Applied Mathematics and Computer Science},
     pages = {285--298},
     year = {2002},
     volume = {12},
     number = {2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IJAMCS_2002_12_2_a14/}
}