1. Exhaust gas purification;Ottengraf,1986
2. Methods for the biological treatment of exhaust gases;Shoda,1991
3. Odor control using biofilters;Williams;Biocycle,1992
4. Biofilters and facility operations;Williams;Biocycle,1992
5. Removal of NH3 by a peat biofilter without and with nitrifier;Togashi;J. Ferment. Technol.,1986