@misc{oai:u-ryukyu.repo.nii.ac.jp:02019730, author = {藤井, 道彦 and 逆井, 卓也}, month = {2023-01-25}, note = {Computer program written in Mathematica to calculate the spherical growth series of amalgamated free products of infinite cyclic groups}, title = {Computer program written in Mathematica to calculate the spherical growth series of amalgamated free products of infinite cyclic groups}, year = {} }