Maryam, M., D. A. Anggoro, M. F. Tika, and F. C. Kusumawati. “An Intelligent Hybrid Model Using Artificial Neural Networks and Particle Swarm Optimization Technique For Financial Crisis Prediction”. Pakistan Journal of Statistics and Operation Research, Vol. 18, no. 4, Dec. 2022, pp. 1015-2, doi:10.18187/pjsor.v18i4.3927.