[1. Arsenault J., Dubreuil P., Girard C.H., Simard C., Belanger D.: Maedi-visna impact on productivity in Quebeck sheep flocks (Canada). Prev Vet Med 2003, 50, 125-137.10.1016/S0167-5877(03)00086-2]Search in Google Scholar
[2. Berriatua E., Alvarez V., Extramiana B., Gonzalez L., Daltabuit M., Juste R.: Transmission and control implications of seroconversion to Maedi-Visna virus in Basque dairy - sheep flocks. Prev Vet Med 2003, 60, 265-279.10.1016/S0167-5877(03)00163-6]Search in Google Scholar
[3. Brodie S., Concha-Bermejillo A., Snowder G., Demartini J.: Current concepts in the epizootiology, diagnosis and economic importance of ovine progressive pneumonia in North America. Small Ruminant Res 1998, 27, 1-17.10.1016/S0921-4488(97)00019-9]Search in Google Scholar
[4. Gruszecki T., Lipecka C.: Evaluation of the implementation of national programme for improvement of the sheep prolificacy and plans for the future. Anim Product Review 2002, 6, 10-12.]Search in Google Scholar
[5. Houwers D.J.: Importance of ewe/lamb relationship and breed in the epidemiology of maedi-visna virus infections. Res Vet Sci 1984, 46, 5-8.10.1016/S0034-5288(18)31108-1]Search in Google Scholar
[6. Houwers D.J., Van Der Molen E.J.: A five year serological survey of natural transmission of Meadi Visna virus in flock of sheep, completed with postmortem investigation J Vet Med 1987, 34, 421-431.10.1111/j.1439-0450.1987.tb00416.x]Search in Google Scholar
[7. Kędziora A., Junkuszew A., Lipecka C., Gruszecki T.M., Kuźmak J.: Susceptibility of sheep of different genotype to maedi visna virus infection. Med Weter 2005, 61, 943-945.]Search in Google Scholar
[8. Keen J., Hungerford L., Wittum T., Kwang J., Littledike E.: Risk factors for seroprevalence of ovine lentivirus in breeding ewe flocks in Nebraska USA. Prev Vet Med, 1997, 30, 81-94.10.1016/S0167-5877(96)01121-X]Search in Google Scholar
[9. Kozaczyńska B., Kuźmak J., Rola M.: Application and evaluation of serological methods in the diagnosis of maedi-visna virus infection in sheep from Poland. Med Weter 2002, 58, 444-447.]Search in Google Scholar
[10. Lipecka C., Junkuszew A., Kuźmak J., Kozaczyńska B., Gruszecki T.M.: The relations between breed- and ageassociated susceptibility/resistance of sheep infection with maedi visna virus (MVV) Arch Tierz Dummenrstorf 2006, 49, Special Issue 160-165.]Search in Google Scholar
[11. Salwa A., Węgrzyn G.: Isolating of the maedi virus from sheep in Poland. Med Weter 1993, 49, 298-300.]Search in Google Scholar
[12. Snowder G.D., Gates N.L., Glimp H.A., Gorham J.R.: Prevalence and effect of subclinical ovine progressive pneumonia virus infection on ewe wool and lamb production. J Aro Vet Med Assoc 1990, 4, 475-479.]Search in Google Scholar
[13. Straub O.: Maedi-visna virus infection in sheep. History and present knowledge. Comp Immun Microbiol Infect Dis 2004, 27, 1-5.10.1016/S0147-9571(02)00078-4]Search in Google Scholar
[14. Zadura J., Cąkała S., Roszkowski J.: Progressive sheep pneumonia (Maedi-Visna disease). Med Weter 1975, 31 474.]Search in Google Scholar