ICG 5 - 1994 Singapore No Erosion Filter Test for Selection of Geotextiles for Fissured Soils J. Mlynarek & M. Bouthot, J.Lafleur Access
EuroGeo 6 - 2016 Ljubljana Slovenia A modified gradient ratio test for the filtration performance of geotextiles J.Lafleur Access
ICG 7 - 2002 Nice France - Volume 3 - Geotechnical engineering and reinforced structures Piping bridging and blinding of geotextiles as evaluated from the gradient ratio test.pdf J. Francoeur & Y. Faure, J.Lafleur Access
