SKOUTELAS, D.; RICARDO-DA-SILVA, J.; LAUREANO, O. Validation and Comparison of Formol and FT-IR Methods for Assimilable Nitrogen in Vine Grapes. South African Journal of Enology and Viticulture, [S. l.], v. 32, n. 2, p. 262–266, 2011. DOI: 10.21548/32-2-1386. Disponível em: https://www.journals.ac.za/sajev/article/view/1386. Acesso em: 23 feb. 2026.