Indirect remote sensing of a cryptic forest understorey invasive species, Joshi, C,; Leeuw, J, de; Andel, J, van; Skidmore, A, K.; Lekhak, H, D.; Duren, I, C. van; Norbu, N, , Forest Ecology and Management, Volume 225, Number 1/3, p.245-256, (2006) Abstract