1. Using a modified pyconometer to determine free air space and bulk density of compost mixtures while simulating compressive loading;Agnew,2002
2. A modified air pycnometer for compost air volume and density determination;Agnew;Canadian Biosystems Engineering,2003
3. Literature review the physical properties of compost;Agnew;Compost Science and Utilization,2003
4. Baker, S.M., Richard, T.L., Zhang, Z., Monterio da Rocha, S., 1989. Determining the free air space inside compost mixtures using a gas pycnometer. ASAE paper No. 98–4094. St. Joseph, MI.
5. Pressure losses in ventilated paddy rice stores;Calderwood;Food Technology in Australia,1983