Detection of stress in coniferous forest trees with the VIRAF spectrometer. - Claus Buschmann; Ursula Rinderle; Hartmut K. Lichtenthaler (IEEE Trans. Geosci. Remote. Sens., 1991)

The FLEX-Fluorescence Explorer mission project: motivations and present status of preparatory activities. - Marc-Ph. Stoll; Claus Buschmann; Andrew Court; Tuomas Laurila; José Moreno 001; Ismaël Moya (IGARSS, 2003)