Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Watanabe Ikuo and Ikumi Yoshio and Otsuka Hiroo,Utilization of the coal ash as soil substitute: its effect on plant growth,Journal of the Japanese Society of Revegetation Technology,09167439,JAPANESE SOCIETY OF REVEGETATION TECHNOLOGY,2002,28,2,363-368,https://cir.nii.ac.jp/crid/1390282680060448128,https://doi.org/10.7211/jjsrt.28.363