Nursiyanto, W., L. Rohman, M. Alfatun N., and E. Purwandari. “THE EFFECT OF COBALT CONTENT ON MAGNETIC PROPERTIES OF CoFe ALLOYS”. Spektra: Jurnal Fisika Dan Aplikasinya, Vol. 5, no. 2, Aug. 2020, pp. 87 -96, doi:10.21009/SPEKTRA.052.01.