Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Takeo Saegusa and Tsunenori Yokoyama and Shiro Kobayashi,Alternating copolymerizations of dioxaphospholanes with acrylic acid derivatives and with α-keto acids. New synthesis of polyphosphonates,Polymer Bulletin,0170-0839,Springer Science and Business Media LLC,1978-08,1,1,55-59,https://cir.nii.ac.jp/crid/1360299152488228608,https://doi.org/10.1007/bf00280966