Changes

Potential references (https://www.facebook.com/groups/MilkTheFunk/permalink/1190513557643523/?qa_ref=qd&comment_id=1195663997128479&comment_tracking=%7B%22tn%22%3A%22R%22%7D):

# http://onlinelibrary.wiley.com/doi/10.1002/j.2050-0416.1970.tb03259.x/abstract

# http://onlinelibrary.wiley.com/doi/10.1002/jib.40/full

# Kowaka, K., et al. "true value of aroma hops in brewing." Proceedings of the congress-European Brewery Convention. 1983.