Haplometra cylindracea (Zeder, 1800) (Trematoda: Plagiorchiidae): variation in the dates of cercarial shedding for overwintering Galba truncatulaP. Vignoles, G. Dreyfuss and D. RondelaudParasite, 18 2 (2011) 181-184DOI: https://doi.org/10.1051/parasite/2011182181