LYONS, E. T.; TOLLIVER, S. C.; DRUDGE, J. H. Historical perspective of cyathostomes: prevalence, treatment and control programs. Veterinary Parasitology. 1999-08-31, roč. 85, čís. 2–3, s. 97–111; discussion 111-112, 215-225. PMID: 10485357. Dostupné online [cit. 2017-02-05]. ISSN0304-4017. PMID10485357.
LYONS, E. T.; TOLLIVER, S. C.; DRUDGE, J. H. Historical perspective of cyathostomes: prevalence, treatment and control programs. Veterinary Parasitology. 1999-08-31, roč. 85, čís. 2–3, s. 97–111; discussion 111-112, 215-225. PMID: 10485357. Dostupné online [cit. 2017-02-05]. ISSN0304-4017. PMID10485357.