E. Spyromitros-Xioufis, A. Moumtzidou, S. Papadopoulos, S. Vrochidis, Y. Kompatsiaris, A. K. Georgoulias, G. Alexandri, K. Kourtidis, “Towards improved air quality monitoring using publicly available sky images“, in Multimedia Technologies for Environmental & Biodiversity Informatics, Joly, A., Vrochidis, S., Karatzas, K., Karppinen, A., Bonnet, P. Eds., Multimedia Systems and Applications, Springer, Cham, 20 June, 2018, pp. 67–92.