International Journal of Hygiene and Environmental Health, Volume 221, Issue 7, August 2018, Pages 1047-1053.
Kirsten Spies, Stefan Pleischl, Bernd Lange, Bettina Langer, Iris Hübner, Lars Jurzik, Katrin Luden, Martin Exner
https://www.sciencedirect.com/science/article/pii/S1438463917306818