A path- and label-cost propagation approach to speedup the training of the optimum-path forest classifier. - Adriana S. Iwashita; João Paulo Papa; André N. de Souza; Alexandre X. Falcão; Roberto A. Lotufo; V. M. Oliveira; Victor Hugo C. de Albuquerque; João Manuel R. S. Tavares (Pattern Recognit. Lett., 2014)