KOSTECKÝ, P., ONDRÁŠKOVÁ, A., ŠEVČÍK, S., ROSENBERG, L., & KOHÚT, I. (2021). Observations of the anomalous third Schumann resonance peak during October 21 to 25, 2004 at Modra Observatory and a possible explanation. Contributions to Geophysics and Geodesy, 35(1), 33-51. https://journals.savba.sk/index.php/cgg/article/view/4941