1. Arrouays D, Lagacherie P, Hartemink AE (2017) Digital soil mapping across the globe. Geoderma Reg 9:1–4. https://doi.org/10.1016/j.geodrs.2017.03.002
2. Bartsch A, Widhalm B, Kuhry P, Hugelius G, Palmtag J, Siewert MB (2016) Can C-band synthetic aperture radar be used to estimate soil organic carbon storage in tundra? Biogeosciences 13:5453–5470. https://doi.org/10.5194/bg-13-5453-2016
3. Braun A (2020) Sentinel-1 Toolbox. Sinergetc use of radar and aptical data: combination of Sentinel-1 and Sentinel-2 and application of analysis tools, European Space Agency-ESA. Retrieved 10 February 2020 from: https://step.esa.int/docs/tutorials/S1TBX%20Synergetic%20use%20of%20S1%20(SAR)%20and%20S2%20(optical)%20data%20Tutorial.pdf
4. Camargo OA, Moniz AC, Jorge JA, Valadares JMAS (2009) Métodos de Análise Química, Mineralógica e Física de Solos do Instituto Agronômico de Campinas. Boletim técnico, Ed, Campinas, Instituto Agronômico/Fundação, p 77–106.Retrieved 23 December 2023 from: https://www.iac.sp.gov.br/produtoseservicos/analisedosolo/docs/Boletim_Tecnico_106_rev_atual_2009.pdf
5. Campbell PMDM, Francelino MR, Fernandes EI et al (2019) Digital mapping of soil attributes using machine learning. Rev Ciênc Agron 50:519–528. https://doi.org/10.5935/1806-6690.20190061