Gamon, J. A.; Surfus, J. S. (13 June 1999). "Assessing Leaf Pigment Content and Activity with a Reflectometer". The New Phytologist. 143 (1): 105–117. doi:10.1046/j.1469-8137.1999.00424.x. JSTOR2588519.
Gamon, J. A.; Surfus, J. S. (13 June 1999). "Assessing Leaf Pigment Content and Activity with a Reflectometer". The New Phytologist. 143 (1): 105–117. doi:10.1046/j.1469-8137.1999.00424.x. JSTOR2588519.