1. Bamforth, C.Beer: Tap Into the Art and Science of Brewing; Plenum Publishing Corporation: New York, 1998; Chapter 17, pp 101−116.
2. Smith, G.Beer; Avon Books: New York, 1995.
3. Schreiber, A.; Ritchie, L.Washington Minor Crops. Washington State University: Richland, WA, 1996; pp 158−160.