Canopy Gap Detection and Analysis with Airborne Laser Scanning | SpringerLink
PDF) Comparison of output results from two programmes for hemispherical image analysis: Gap Light Analyser and WinScanopy | Benjamín Jarčuška - Academia.edu
Beckschäfer P, Seidel D, Kleinn C, Xu J (2013). On the exposure of hemispherical photographs in forests. iForest - Biogeosciences and Forestry 6: 228-237.
Review of ground-based methods to measure the distribution of biomass in forest canopies | SpringerLink
Gap Light Analyzer - Forest Ecology and Management (FEAM) Group - Simon Fraser University