G.D. SHARMA AND S.K. SHARMA, Jintu Dutta, N.K. Sankhyan, S.P. Sharma,. Sulphur Fractions in Acid Soil Continuously Fertilized with Chemical Fertilizers and Amendments under Maize-Wheat System. Journal of the Indian Society of Soil Science, India, v. 61, n. 3, 2013. Disponível em: https://epubs.icar.org.in/index.php/JISSS/article/view/35618. Acesso em: 30 oct. 2025.