Detailed coal exploration in Napal, Peranap, Riau, Sumatera, Indonesia
 Artikel Jurnal
Mineral matter and its identification in Indonesian coal
 Artikel Jurnal
Proposal for improving simple jaw crusher performance
 Artikel Jurnal
S. Budi Utomo, author
Evaluasi pengusahaan pertambangan batubara dalam rangka pelaksanaan otonomi daerah
Fakultas Teknik Universitas Indonesia, 2003
 UI - Tesis (Membership)
Proceedings of international conference on mining and the environment : Bandung, Indonesia, July 2-4, 1991
Department of Mining Engineering, ITB , 1992
 Buku Referensi
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