Comparative analysis of the anthelmintic efficacy of European heather extracts on Teladorsagia circumcincta and Trichostrongylus colubriformis egg hatching and larval motility oleh Francesca Shepherd, Caroline Chylinski, Michael R. Hutchings, Joana Lima, Ross Davidson, Robert Kelly, Alastair Macrae, Juha-Pekka Salminen, Marica T. Engström, Veronika Maurer, Håvard Steinshamn, Susanne Fittje, Angela Morell Perez, Rocío Rosa García, Spiridoula Athanasiadou