Schleppi, P., & Paquette, A. (2017). Solar radiation in forests: theory for hemispherical photography. In R. A. Fournier & R. J. Hall (Eds.), Managing forest ecosystems: Vol. 28. Hemispherical photography in forest science: theory, methods, applications (pp. 15-52). https://doi.org/10.1007/978-94-024-1098-3_2