Chen J.M. & Cihlar J., 1995: Quantifying the effect of canopy architecture on optical measurements of leaf area index using two gap size analysis methods. IEEE Trans. Geosci. Remote Sens. 33, 777-787.
Gonsamo A.,
Walter J.-M., Chen J.M., Pellikka P. & Schleppi P., 2018: A robust leaf
area index algorithm accounting for the expected errors in gap fraction
observations. Agric. For. Meteorol., 248: 197-204.
Lang A.R.G., 1987: Simplified estimate of leaf area index from transmittance of the sun's beam. Agric. For. Meteorol. 41, 179-186.
Lang A.R.G. & Xiang Y., 1986: Estimation of leaf area index from transmission of direct sunlight in discontinuous canopies. Agric. For. Meteorol. 37, 229-243.
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Schleppi P., Conedera
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Note: The method published by Schleppi et al. (2007) results
in LAI values expressed by unit of inclined ground. Starting with version 2.1,
Hemisfer now gives the slope-corrected LAI per unit of projected (horizontal)
surface, which is the general standard. See the help about the
slope for further explanations.
Steven M.D., Unsworth M.H., 1980: The angular distribution and interception of diffuse solar radiation below overcast skies. Q. J. R. Meteorol. Soc. 103: 457-465.
Thimonier A., Sedivy I.,
Schleppi P., 2010: Estimating leaf area index in different types of mature
forest stands in Switzerland: a comparison of methods. Eur. J. For. Res.
129: 543-562.
Walter J.-M.N., Torquebiau E.F., 2000: The computation of forest leaf area index on slope using fisheye sensors. C. R. Acad. Sci. III 323: 801-813.