Comparison of the R-R intervals in ECG and Oximeter signals to be used in complexity measures of Natural Time Analysis. - Giorgos Baldoumas; Dimitrios Peschos; Georgios Tatsis; Constantinos I. Votis; Spyridon K. Chronopoulos; Vasilis Christofilakis; Panos Kostarakis; Nicholas V. Sarlis; Efthimios S. Skordas; K. K. Naka; A. Bechlioullis (MOCAST, 2018)

Study of Geo-Electric Data Collected by the Joint EMSEV-Bishkek RS-RAS Cooperation: Possible Earthquake Precursors. - Konstantina Papadopoulou; Efthimios S. Skordas; Jacques Zlotnicki; Toshiyasu Nagao; Anatoly Rybin (Entropy, 2018)

Study in Natural Time of Geoelectric Field and Seismicity Changes Preceding the Mw6.8 Earthquake on 25 October 2018 in Greece. - Nicholas V. Sarlis; Efthimios S. Skordas (Entropy, 2018)

Tsallis Entropy Index q and the Complexity Measure of Seismicity in Natural Time under Time Reversal before the M9 Tohoku Earthquake in 2011. - Panayiotis A. Varotsos; Nicholas V. Sarlis; Efthimios S. Skordas (Entropy, 2018)

Identifying the Occurrence Time of the Deadly Mexico M8.2 Earthquake on 7 September 2017. - Nicholas V. Sarlis; Efthimios S. Skordas; Panayiotis A. Varotsos; Alejandro Ramírez-Rojas; Elsa Leticia Flores-Márquez (Entropy, 2019)

Natural Time Analysis of Seismicity within the Mexican Flat Slab before the M7.1 Earthquake on 19 September 2017. - Elsa Leticia Flores-Márquez; Alejandro Ramírez-Rojas; Jennifer Perez-Oregon; Nicholas V. Sarlis; Efthimios S. Skordas; Panayiotis A. Varotsos (Entropy, 2020)

Natural Time Analysis: The Area under the Receiver Operating Characteristic Curve of the Order Parameter Fluctuations Minima Preceding Major Earthquakes. - Nicholas V. Sarlis; Efthimios S. Skordas; Stavros-Richard G. Christopoulos; Panayiotis A. Varotsos (Entropy, 2020)

Estimating the Epicenter of a Future Strong Earthquake in Southern California, Mexico, and Central America by Means of Natural Time Analysis and Earthquake Nowcasting. - Jennifer Perez-Oregon; Panayiotis K. Varotsos; Efthimios S. Skordas; Nicholas V. Sarlis (Entropy, 2021)

Earthquake Nowcasting: Retrospective Testing in Greece. - Gerasimos Chouliaras; Efthimios S. Skordas; Nicholas V. Sarlis (Entropy, 2023)

Natural time analysis together with non-extensive statistical mechanics shorten the time window of the impending 2011 Tohoku M9 earthquake in Japan. - Panayiotis A. Varotsos; Nicholas V. Sarlis; Efthimios S. Skordas; Toshiyasu Nagao; Masashi Kamogawa (Commun. Nonlinear Sci. Numer. Simul., 2023)