Jakab, G., Ádám Rieder, A. V. Vancsik, and Z. Szalai. “Soil Organic Matter Characterisation by Photometric Indices or Photon Correlation Spectroscopy: Are They Comparable?”. Hungarian Geographical Bulletin, Vol. 67, no. 2, June 2018, pp. 109-20, doi:10.15201/hungeobull.67.2.1.