Nogueira, Paulyene, Givago Coutinho, Rafael Pio, Daniel Silva, e Carolina Zambon. 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.