1. 1) Öko-institut and Fraunhofer-institut IZM: “Assistance to the Commission on Technological Socio-Economic and Cost-Benefit Assessment Related to Exemptions from the Substance Restrictions in Electrical and Electronic Equipment, Final Report”, (2016) 338–368.
2. 2) Öko-institut: “8th Adaptation to scientific and technical progress of exemptions 2(c), 3 and 5 of Annex II to Directive 2000/53/EC (ELV), Final Report”, (2016) 22–41.
3. 3) K. Oishi, T. Matsumoto and T. Okubo: J. Jpn. Copper Brass Res. Assoc. 39 (2000) 8–15.
4. 4) K. Oishi, I. Sasaki and J. Otani: Mater. Lett. 57 (2003) 2280–2286. doi:10.1016/S0167-577X(02)01211-9
5. 5) K. Nakayama: The Metal Cutting in its Principle, (Corona Publishing Co., Ltd., Tokyo, 1978) p. 94.