@conference {, title = {The Drupal Framework: A Case Study to Evaluate Variability Testing Techniques}, booktitle = {Proceedings of the Eighth International Workshop on Variability Modelling of Software-Intensive Systems (VAMOS 2014)}, number = {11}, year = {2014}, month = {01/2014}, publisher = {ACM}, organization = {ACM}, address = {Nice, France}, isbn = {978-1-4503-2556-1}, doi = {10.1145/2556624.2556638}, author = {Ana B. S{\'a}nchez and S. Segura and Antonio Ruiz-Cort{\'e}s} }