1. R. Found, "Biology Letters." 13, "Interactions between cleaner-birds and ungulates are personality dependent." 20170536 (2017)
2. WM Samuel and DA Welch "Alces." 27, "Winter ticks on moose and other ungulates: Factors influencing their population size." 169 (1991)
3. WM. Samuel, "Alces." 43, "Factors affecting epizootics of winter ticks and mortality of moose." 39 (2007)
4. Js Marks, P Hendricks, D Casey, "Birds of Montana." 659 (2016)
5. M Samish and J Rehacek "Annual Review of Entomology." 44, "Pathogens and predators of ticks and their potential in biological control." 159 (1999)