Kammann et al.
Methane flux from grassland

Ka'Ki et al.
Diurnal methane emissions from a boreal lake

Ramakrishnan et al.
Methanogens in rice soils

Lassey et al.
Methane emission from livestock and SF6

Reay
Balancing methane production and consumption for UK livestock

Prieme and Christensen
N2O, CO2 and CH4 emission from disturbed farm soils