Wijayanto, Arif Kurnia, et al. “Spectral Pattern of Paddy As Response to Drought Condition: An Experimental Study”. Jurnal Pengelolaan Sumberdaya Alam Dan Lingkungan (Journal of Natural Resources and Environmental Management), vol. 11, no. 1, Apr. 2021, pp. 83-92, https://doi.org/10.29244/jpsl.11.1.83-92.