American Society for Testing and Materials (ASTM) 2019. Standard Practice for Determination of Water Activity (aW) in Cannabis Flower. ASTM: https://www.astm.org/Standards/D8196.htm
Barbosa-Cánovas, Gustavo V., Fontana J., Anthony., Schmidt, Shelly., Labuza, Theodore P., 2020. Water Activity in Foods: Fundamentals and Applications, 2nd Edition. John Wiley & Sons, Inc. and the Institute of Food Technologists.