Jesús Montiel, J. Allan Downie, Attila Farkas, Péter Bihari, Róbert Herczeg, Balázs Bálint, Peter Mergaert, Attila Kereszta, and Éva Kondorosi: Morphotype of bacteroids in different legumes correlates with the number and type of symbiotic NCR peptides  http://www.pnas.org/content/early/2017/04/18/1704217114 (doi: 10.1073/pnas.1704217114)