Kylin, H.; Bouwman, H.; Louette, M. (2011). Distributions of the subspecies of Lesser Black-backed Gulls Larus fuscus in sub-Saharan Africa. Bird Study 58(2): 186-192. https://dx.doi.org/10.1080/00063657.2011.555517, more
Kylin, H.; Louette, M.; Herroelen, P.; Bouwman, H. (2010). Nominate lesser black-backed gulls (Larus fuscus fuscus) winter in the Congo basin. Ornis Fennica 87(3): 106-113, more