1. I. M. Astika, IOP Conference Series: Materials Science and Engineering 539 (2019).
2. A. Arifin, R. Sipahutar, D. K. Pratiwi, I. Bizzy, D. Purba and Gunawan, Journal of Engineering Science and Technology 13 (10), 3080 – 3091 (2018).
3. DEVELOPMENT COMPOSITE ALUMINIUM/FLY ASH WITH POWDER METALLURGY METHOD USE EGG YOLK AS SPACE HOLDER
4. D. R. Askeland, p. P. Fulay and W. J. Wright, The Science and Engineering of Materials. (Cengage Learning, 2010).
5. ASM Handbook Volume 2: Properties and Selection: Nonferrous Alloys and Special-Purpose Materials. (ASM International, 1990).