Saiuparad, S., K. Muangchoo, S. Tangcharoen, P. Mee-on, and S. Ekvittayaniphon. “Multivalued Nonlinear Weakly Picard Operators in Metric Spaces”. Progress in Applied Science and Technology, vol. 12, no. 3, Oct. 2022, pp. 1-6, doi:10.14456/past.2022.7.