A. F. Posnette (2004). Hatton, Sir Ronald George (1886–1965). Oxford Dictionary of National Biography. Oxford: Oxford University Press. doi:10.1093/ref:odnb/33759. (subscription required). http://www.oxforddnb.com/view/article/33759
Lorraine Berkett (2006). Apple Orchard Information for Beginners. The University of Vermont. Archived 10 February 2006. https://web.archive.org/web/20060210084945/http://orchard.uvm.edu/uvmapple/ForBeginners_ApplesJanuary2006.PDF
Tony Webster, Ken Tobutt, Kate Evans (2000). Breeding and Evaluation of New Rootstocks for Apple, Pear and Sweet Cherry. Conference paper, 43rd Annual IDFTA Conference, February 6–9, 2000, Napier, New Zealand. International Dwarf Fruit Tree Association.
Accessed September 2017. http://virtualorchard.net/idfta/cft/2000/october/cftoct2000p100.pdf
Lorraine Berkett (2006). Apple Orchard Information for Beginners. The University of Vermont. Archived 10 February 2006. https://web.archive.org/web/20060210084945/http://orchard.uvm.edu/uvmapple/ForBeginners_ApplesJanuary2006.PDF
Tony Webster, Ken Tobutt, Kate Evans (2000). Breeding and Evaluation of New Rootstocks for Apple, Pear and Sweet Cherry. Conference paper, 43rd Annual IDFTA Conference, February 6–9, 2000, Napier, New Zealand. International Dwarf Fruit Tree Association.
Accessed September 2017. http://virtualorchard.net/idfta/cft/2000/october/cftoct2000p100.pdf
Lorraine Berkett (2006). Apple Orchard Information for Beginners. The University of Vermont. Archived 10 February 2006. https://web.archive.org/web/20060210084945/http://orchard.uvm.edu/uvmapple/ForBeginners_ApplesJanuary2006.PDF
East Malling catalogues
F. Brumm, Der Baumschulbetrieb, 1949
Tukey Harold Bradford, Dwarfed fruit trees, 1964