Humphreys, B. R., Johnson, B. K., Mason, D. S., Whitehead, J. C. Julkaisussa Journal of Sports Economics (2018) “...Johnson, B. K....”
Humphreys, B. R., Johnson, B. K., Mason, D. S., Whitehead, J. C. Julkaisussa Working Paper No. 2011-20 (2011) “...Johnson, B. K....”