@article{Gonzalez-Garcia:2001sU, author = "Gonzalez-Garcia, Concepcion and Maltoni, M. and Pena Garay, C.", title = "{Update on solar and atmospheric four-neutrino oscillations }", doi = "10.22323/1.007.0191", journal = "PoS", year = 2001, volume = "hep2001", pages = "191" }