Spiliotis, Evangelos; Legaki, Nikoletta Zampeta; Assimakopoulos, Vassilios; Doukas, Haris; El Moursi, Mohamed Shawky: 'Tracking the performance of photovoltaic systems: a tool for minimising the risk of malfunctions and deterioration', IET Renewable Power Generation, 2018, 12, (7), p. 815-822, DOI: 10.1049/iet-rpg.2017.0596
IET Digital Library, https://digital-library.theiet.org/;jsessionid=shoia43h23jz.x-iet-live-01content/journals/10.1049/iet-rpg.2017.0596