Voitik, A., Kravchenko, V., Pushka, O., Kutkovetska, T., Shchur, T. and Kocira, S. (2023) “Comparison of NDVI, NDRE, MSAVI and NDSI Indices for Early Diagnosis of Crop Problems”, Agricultural Engineering , 27, pp. 47-57. doi: 10.2478/agriceng-2023-0004.