Bijak, Katarzyna. 2006. “Estimation, Decoding and Forecasting in HMM and Hybrid HMM ANN Models: A Case of Seismic Events in Poland”. Studia Informatica. System and Information Technology 7 (1-2): 7-17. https://czasopisma.uph.edu.pl/studiainformatica/article/view/2846.