1. ETEM Group 2018, Aluminium -the second most used metal in the world (www.etem.bg/blog/a luminijat-vtorijat-naj-izpolzvan-metal-v-sveta)
2. Classification of parts used in mechatronic products and produced by permanent-mold casting methods
3. Groover M., Fundamentals of Modern Manufacturing Materials, Processes, and Systems 5th Edition (USA John Wiley & Sons Inc. IBSN 978-1-118-231463, 2013) p 263
4. Singh U. and Dwivedi M., Manufacturing Processes 2end Edition (New Age International (P) Ltd., ISBN: 978-81-224-2875-9, 2009) p 320
5. YIZUMI, DM Series Cold Chamber Die Casting Machine (www.yizumi.com/cn/dcm/subproducts, 2020)