Setiawan, A. ., and J. R. . Horman. “REGULATION DEVELOPMENT OF INCREASING NICKEL ADDED VALUE IN INDONESIA: PERKEMBANGAN REGULASI PENINGKATAN NILAI TAMBAH NIKEL DI INDONESIA”. INTAN Jurnal Penelitian Tambang, vol. 2, no. 2, Feb. 2022, pp. 106-17, doi:10.56139/intan.v2i2.31.