Freitag, Suelen, and Mauricio Sperandio. “Determining the Reliability of Power Transformers Considering a Five States Markov Model”. IEEE Latin America Transactions 19, no. 2 (February 24, 2021): 335–341. Accessed April 20, 2024. https://latamt.ieeer9.org/index.php/transactions/article/view/3290.