1. On the lubrication of worm gears;Wakuri;J. JSME,1957
2. Studies on the performance of worm gear materials in relation to scuffing;Hirano;J. JSME,1958
3. On wear of worm gear materials;Wakuri,1958
4. On the effect of the angle between the contact line and the direction of sliding in relation to friction and wear;Hirano,1961