Huxham, M., Raffaelli, D., & Pike, A. (1993). The influence of Cryptocotyle lingua (Digenea:Platyhelminthes) infections on the survival and fecundity of Littorina littorea (Gastropoda:Prosobranchia); an ecological approach. Journal of Experimental Marine Biology and Ecology, 168(2), 223-238. https://doi.org/10.1016/0022-0981%2893%2990262-m