Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) KAMEOKA Hiromu and MASEKI Masayoshi and HIRAO Nenokichi,The Constituents of Natural Butter Flavor and Synthesis of δ-Alkylvalerolactone,Journal of Japan Oil Chemists' Society,0513398X,Japan Oil Chemists' Society,1974,23,7,400-404,https://cir.nii.ac.jp/crid/1390282680309143040,https://doi.org/10.5650/jos1956.23.400