Cruz, Lana Ivone Barreto, et al. “Growth and Nutrition of ’Imperial’ Pineapple Nursery Plants Associated With the Fungus Piriformospora Indica and Herbicide Application”. Semina: Ciências Agrárias, vol. 36, no. 4, Aug. 2015, pp. 2407-22, doi:10.5433/1679-0359.2015v36n4p2407.