http://www.ams.org/mrlookup?s3=tsugawa%2Ck&pg3=ICN&s4=&pg4=TI&s5=&pg5=JOUR&ipage=&fpage=&arg3=&format=mrcit&Search=Search

http://www.ams.org/mrlookup?s3=tsugawa%2Ck&pg3=ICN&s4=&pg4=TI&s5=kokyuroku&pg5=JOUR&ipage=&fpage=&arg3=&format=mrcit&Search=Search

硬球六２本
論文３本
計５本

ものすごい多作だね。