Penov, N., Guerova, G. and Stoycheva, A. 2022. Fog Climatology and Stability Index for Plovdiv 1991–2018. Proceedings of the Bulgarian Academy of Sciences. 75, 8 (Aug. 2022), 1156–1164. DOI:https://doi.org/10.7546/CRABS.2022.08.08.