@article{Oyarbide:56833,
      author        = "Oyarbide, E. and Bernal, C. and Molina, P. and Jiménez,
                       L.A. and Gálvez, R. and Martínez, A.",
      title         = "{Voltage equalization of an ultracapacitor module by cell
                       grouping using number partitioning algorithm}",
      year          = "2016",
}