C. Riveros, Carlos M., Armando M. V. Corro, and Raquel P. de Araújo. “Graph-Type Biharmonic Surfaces in R3”. Selecciones Matemáticas 7, no. 01 (July 25, 2020): 97-107. Accessed April 25, 2024. https://revistas.unitru.edu.pe/index.php/SSMM/article/view/2959.