4U. S. Environmental Protection Agency, Measurement Technology Laboratories PMz : Teflon Filters Quality Assurance Project Plan Category IV. 2010.
5Jeff D. Yanosky, David L. Macintosh, A comparison of four gravimetric fine particle sampling methods, Journal of the Air &Waste Management Association ,2001,51:6.
7Pat E. Rasmussen, H. David Gardner,. et. Buoyancy - corrected Gravimetric Analysis of Lightly Loaded Filter, Journal of the Air &Waste Management Association ,2010,60:9,1065 - 1077.