Nogueira, P., Coutinho, G., Pio, R., Silva, D., & Zambon, C. (2016). Establishment of growth medium and quantification of pollen grains and germination of pear tree cultivars. Revista Ciência Agronômica, 47(2). https://periodicos.ufc.br/revistacienciaagronomica/article/view/84632