1. Some experiments on the influence of various factors on drill performance;Galloway;Transactions of the ASME,1957
2. The spiral point dril. -A new concept in drill point geometry;Ernst;Transactions of the ASME,1958
3. Cylindrical flank twist drill point;Fugelso;ASME Journal of Engineering for Industry,1983
4. Mathematical model for muti-facet drills;Wu;ASME Journal of Engineering for Industry,1983
5. Planar micro-drill point design and grinding methods;Lin;Transactions of the North American Manufacturing Research Institution of SME,1992