Detection of soybean rust contamination in soy leaves by FTIR photoacoustic spectroscopyL. H.C. Andrade, P. G. Freitas, B. G. Mantovani, M. S. Figueiredo, R. A. Lima, S. M. Lima, M. A.S. Rangel and R. M. MussuryEur. Phys. J. Special Topics, 153 (2008) 539-541DOI: https://doi.org/10.1140/epjst/e2008-00503-8