Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) KAWAMATA Shigetoshi,Studies on a Hardened Disorder of Japanese Pear (Pyrus serotina var. culta Rehder) Fruits,Journal of the Japanese Society for Horticultural Science,0013-7626,THE JAPANESE SOCIETY FOR HORTICULTURAL SCIENCE,1979,48,2,137-146,https://cir.nii.ac.jp/crid/1390282681279571328,https://doi.org/10.2503/jjshs.48.137