Bolívar D M, Cerón-Muńoz M F, Elzo M A, Ramírez E J and Agudelo D A 2013:
Growth curves for buffaloes using random regression mixed models with different structures of residual variances.
Livestock Research for Rural Development. Volume 25, Article #136.
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, from http://www.lrrd.org/lrrd25/8/boli25136.htm