Cruz, Darci de Oliveira, et al. “Pollination Efficiency of the Stingless Bee <i>Melipona subnitida< i> On Greenhouse Sweet Pepper”. Pesquisa Agropecuaria Brasileira, vol. 40, no. 12, Dec. 2005, pp. 1197-01, doi:10.1590/S1678-3921.pab2005.v40.7084.