Lassen, B; Viltrop, A; Raaperi, K; Järvis, T. Eimeria and Cryptosporidium in Estonian dairy farms in regard to age, species, and diarrhoea. Vet. Parasitol. 2009, 166 (3–4): 212–229. PMID 19747778. doi:10.1016/j.vetpar.2009.08.022.
Lassen, B; Østergaard, S. Estimation of the economical effects of Eimeria infections in Estonian dairy herds using a stochastic model. Prev. Vet. Med. 2012, 106 (3–4): 258–265. doi:10.1016/j.prevetmed.2012.04.005.
Lassen, B; Viltrop, A; Raaperi, K; Järvis, T. Eimeria and Cryptosporidium in Estonian dairy farms in regard to age, species, and diarrhoea. Vet. Parasitol. 2009, 166 (3–4): 212–229. PMID 19747778. doi:10.1016/j.vetpar.2009.08.022.