Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) T. Mashiko and K. Odaka and K. Ueno and C. Purcell,Describing head shape with surface harmonic expansions,IEEE Transactions on Biomedical Engineering,0018-9294,Institute of Electrical and Electronics Engineers (IEEE),1991-03-01,38,,303-306,https://cir.nii.ac.jp/crid/1870020693157218688,https://doi.org/10.1109/10.133214