ZABKIEWICZ, J.; HORGAN, D. Fluorpen a simple hand held chlorophyll fluorescence measuring instrument. New Zealand Plant Protection, [S. l.], v. 61, p. 395–395, 2008. DOI: 10.30843/nzpp.2008.61.6874. Disponível em: https://journal.nzpps.org/index.php/nzpp/article/view/6874. Acesso em: 3 oct. 2022.