Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI)
Vladimir Shpilrain,Counting primitive elements of a free group,Geometric Methods in Group Theory,0271-4132,American Mathematical Society,2005,,,91-97,https://cir.nii.ac.jp/crid/1360011145447699712,https://doi.org/10.1090/conm/372/06876