Estimation of gap fraction and foliage clumping in forest canopiesKuusk, Andres; Pisek, Jan; Lang, Mait; Märdla, SiljaRemote sensing2018 / art. 1153, 17 p. : ill https://doi.org/10.3390/rs10071153 Journal metrics at Scopus Article at Scopus Journal metrics at WOS Article at WOS