@article{Lara:2014:UMM:2702120.2685615,
  author    = {Lara, Juan De and Guerra, Esther and Cuadrado, Jes\'{u}s S\'{a}nchez},
  title     = {When and how to use multilevel modelling},
  journal   = {ACM Trans. Softw. Eng. Methodol.},
  volume    = {24},
  number    = {2},
  year      = {2014},
  pages     = {12:1--12:46},
  articleno = {12},
  numpages  = {46},
  url       = {http://doi.acm.org/10.1145/2685615},
  doi       = {10.1145/2685615},
  publisher = {ACM},
}