6M.EL - Fadel, M. Massoud. Methane emissions from wastewater management. Environmental Pollution, 2001 ( 114 ): 177 - 185
7Milich. Lenard. Tne role of methane in global warming: where might mitigation strategies be focused?. Global Environmental Change, 1999,9(3): 179 - 201
10Paiva N T, Pereira J, Ferra J M. Study of influence of synthesis con- ditions on properties of melamine-urea formaldehyde resins[ J]. In- ternational Wood Products Journal,2012,3 ( 1 ) : 51 - 57.