We've talked lately about the role of science in beekeeping, and are here particularly interested in science and treatment-free beekeeping. This recent paper by arguably _the_ foremost beekeeper-scientist, John Kefuss, is I think a milestone in the case for treatment free beekeeping.
It contains as least some treatment of pretty much all the questions that need to be addressed by beekeepers wishing to go treatment free, and supplies references to anyone who wants to dig deeper:
Selection for resistance to Varroa destructor under commercial beekeeping conditions
John Kefuss, Jacques Vanpoucke, Maria Bolt & Cyril Kefuss
Journal of Apicultural Research
Volume 54, 2015 - Issue 5
Received 08 Jun 2015, Accepted 24 Feb 2016, Published online: 02 Jun 2016