Igor Miňo and  Lenka Lešková,  Comparison of Selected Behavioural Patterns of German Shepherd Puppies in Open-Field Test by Practical Assessment Report.   journal   = {International Journal of Animal and Veterinary Sciences}, [online]. World Academy of Science, Engineering and Technology.
    January 2017, vol. 122(2). 86 - 90
    [viewed 15 August 2020]. Available from: https://publications.waset.org/pdf/10006250.