KALIS, Harijs; KANGRO, Ilmārs. Effective Finite Difference and Conservative Averaging Methods for Solving Problems of Mathematical Physics. Rēzekne, Latvia: Rēzeknes Tehnoloģiju akadēmija,2021. Disponível em: https://books.rta.lv/index.php/RTA/catalog/book/24.. Acesso em: 18 oct. 2024.