Ganev, Kaloyan. “Real-Time Vs. Full-Sample Performance of One-Sided and Two-Sided HP Filters. An Application to 27 EU Member States’ GDP Data”. Central European Journal of Economic Modelling and Econometrics, vol. 12, no. 3, June 2020, pp. 251-72, doi:10.24425/cejeme.2020.134748.