Global situation for organic tree fruits August 11, 2016 David Granatstein, Elizabeth Kirby, Harold Ostenson, Helga Willer. 2016. Scientia Hort. 208:3-12. Review of area, yields, and economics.
Current world status of organic temperate fruits July 12, 2010 Granatstein, D., Kirby, E., Willer, H. 2010. Acta Hort. 873:19-36.
Organic horticulture expands globally July 6, 2010 Granatstein, D., Kirby, E., Willer, H. 2010. Chronica Hort. December 2010. 50(4):31-38.