1. Functional Roles of Soil Organic Matter;Aoyama M.;Humic Substances Research,2015
2. Separation of acid-soluble constituents of soil humic acids by dissolution in alkaline urea solution and precipitation with acid
3. Aoyama, M. 2016. “Fluorescent Properties of Soil Humic and Fulvic Acids Revealed by Hydrophilic Interaction Chromatography and Excitation–Emission Matrix Fluorescence Spectroscopy.” Abstracts of the 18th Meeting of the International Humic Substances Society, Kanazawa, Japan, 1–10.
4. Spectrophotometric and Mass Spectrometric Properties of Lake Biwa Fulvic Acids, a Japanese Humic Substances Society Standard Sample;Aoyama M.;Humic Substances Research,2019
5. Humic and fulvic acids as biostimulants in horticulture