Siregar, I. P. S., Widyasari, R. and Prasetya, N. H. (2021) “A Weighted Markov Chain Application to Predict Consumer Price Index When Facing Pandemic Covid-19”, Quadratic: Journal of Innovation and Technology in Mathematics and Mathematics Education, 1(1), pp. 41–46. doi: 10.14421/quadratic.2021.011-06.