11.
Barea J.M., Toro M., Orozco M.O., Campos E., and Azcón R., 2002. The application of isotopic (32P and 15N) dilution techniques to evaluate the interactive effect of phosphate-solubilizing rhizobacteria, mycorrhizal fungi and Rhizobium to improve the agronomic efficiency of rock phosphate for legume crops. Nutrient Cycling Agroecosys., 63(1), 35-42.