@phdthesis{Heggemann2014,
author = {Heggemann, Volker},
year = {2014},
title = {Untersuchungen zur Diagnostik der Spurenelementversorgung von Holstein-
Friesian-Milchkühen},
type = {Dissertation},
url = "http://dx.doi.org/10.17169/refubium-7440",
}