1. The hob parameters for worm gear with concave profile;Yetian,1988
2. Profile design and sharpened error compensation of gear hobs;Shusen,1988
3. Relief grinding of hob for toothed workpiece having arbitrary profile;Nakano,1990
4. The principle of accurate relief grinding hob;Dianlong,1988
5. Computer aided design of hobs for gear manufacture of the worm gear drive with ground worm;Simon,1979