Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Mizuta Mekumi,The following four factors are characteristics of the development of language and communication among children with Down syndrome,NO TO HATTATSU,0029-0831,The Japanese Society of Child Neurology,2018,50,2,115-120,https://cir.nii.ac.jp/crid/1390282680495856640,https://doi.org/10.11251/ojjscn.50.115