“Polyhydroxyalcanoates of strains of Azospirillum spp. isolated of roots of Lycopersicon esculentum Mill. “tomato” and Oryza sativa L. ‘rice’ in Lambayeque” (2010) Scientia Agropecuaria, 1(3 y 4), pp. 213–224. doi:10.17268/sci.agropecu.2010.04.05.