1. Microbiology of Anaerobic Digestion
2. S. Hadi, Suyitno, K. J. Kroda, Z. Arifin and H. Kusbandriyo, Appl. Mech. Mater. 575 (2014), 628–634 (2014).
3. Suyitno, Teknologi Gasifikasi Biomasa Untuk Penyediaan Listrik dan Panas Skala Kecil Menengah. (UNS Press, Surakarta, Indonesia, 2008).
4. F. Lettner, P. Haselbacher, H. Timmerer, P. Leitner, Suyitno and B. Rasch, presented at the 15th European Biomass Conference & Exhibition - From Research to Market Deployment - Biomass for Energy, Industry and Climate Protection, Berlin, Germany, 2007 (unpublished).
5. P. Haselbacher, F. Lettner, H. Timmerer, Suyitno and B. Rasch, presented at the 14th European Conference & Exhibition: Biomass for Energy, Industry and Climate Protection, Paris, France, 2005 (unpublished).