Kumpula, J., Colpaert, A. and Nieminen, M. 2002. Productivity factors of the Finnish semi-domesticated reindeer (Rangifer t.tarandus) stock during the 1990s. Rangifer. 22, 1 (Jun. 2002), 3–12. DOI:https://doi.org/10.7557/2.22.1.387.