SINCHAISRI, P. Study on Pyrethrin Content in Pyrethrum Flower Head at Different Stages of Development . Thai Agricultural Research Journal, [S. l.], v. 1, n. 1, p. 31–34, 1983. Disponível em: https://li01.tci-thaijo.org/index.php/thaiagriculturalresearch/article/view/245705. Acesso em: 1 oct. 2026.