Coronel Méndez, M. de los A., K. González, P. Escárate, R. Carvajal, and J. Agüero. “On Maximum Likelihood Estimation of Continuous-Time Oscillators Modelled As Continuous-Time Autoregressive System”. IEEE Latin America Transactions, vol. 17, no. 7, Dec. 2019, pp. 1214-9, https://latamt.ieeer9.org/index.php/transactions/article/view/1065.