N. Felipe da Silva, J. M. Nassar, and M. A. de Aguiar e Silva, “Thermal variability and the probability of frost and extreme heat in the Mesoregion Northern Pioneer of the Paraná State (Brazil) - case study of the year 2019: Thermal variability and the probability of frost and extreme heat in the Mesoregion Northern Pioneer of the Paraná State (Brazil) - case study of the year 2019”, RG, vol. 12, no. 39, pp. 216–237, Jul. 2021.