9Krylova, Nailia I. Influence of ammonium and methods for removal during the anaorl- bic treatment of poultry manure[ J ]. Journal of Chemical Technology and Biotechnology, 1997,70(1 ) :99 - 105.
10S. Iniyana;, K. Sumathy.The application of a Delphi technique in the linear programming optimization of future renewable energy options for India [J]. Biomass and Bioenergy,2003, (24) :39 - 50.
