Spectral reflectance patterns and seasonal dynamics of common understory types in three mature hemi-boreal forests. - Maris Nikopensius; Jan Pisek; Kairi Raabe (Int. J. Appl. Earth Obs. Geoinformation, 2015)

Estimating the clumping index at two contrasting points in the growing season using a variety of field-based methods. - Kairi Raabe; Jan Pisek; Mait Lang; Lauri Korhonen (IGARSS, 2016)