I want to know the answer to the following question:
The writers Jonassohn and Bjornson cite various reasons for the lack of widespread support of what?
All the background I'm provided with is that "As such the wording of the treaty is not intended to be a definition suitable as a research tool, and although it is used for this purpose, as it has an international legal credibility that others lack, other definitions have also been postulated.". Is that enough to answer the question?