Lihat Juga

• Supplementary material 1 from: Pontoppidan M, Nachman G (2013) Changes in behavioural responses to infrastructure affect local and regional connectivity – a simulation study on pond breeding amphibians. Nature Conservation 5: 13-28. https://doi.org/10.3897/natureconservation.5.4611
  oleh: Pontoppidan, Maj-Britt, et al.
  Terbitan: (2013)
• Spatial Amphibian Impact Assessment – a management tool for assessment of road effects on regional populations of Moor frogs (Rana arvalis)
  oleh: Pontoppidan, Maj-Britt, et al.
  Terbitan: (2013)
• Research on farmer's objectives for breeding, report of a workshop following a regional study in Asia, edited by John B. Raintree and David A. Tay
• Factors affecting calf crop, edited by T.J. Cunha, A.C. Warnick and M. Ro
• A World Dictionary of Livestock Breed, Types And Varietes
  oleh: Mason, I.L.