Exploiting the feature space structures of KNN and OPF algorithms for identification of incipient faults in power transformers - Gifalli, Andre; Ikeshoji, Marco Akio; Gastaldello, Danilo Sinkiti; Yamaguchi, Victor Hideki Saito; Bassi, Welson; Mazon, Talita; Torres Neto, Floriano; Costa Junior, Pedro da; Souza, André Nunes (Machine Learning and Knowledge Extraction, 2025)