“A transient water release and imbibition method for rapidly measuring wetting and drying soil water retention and hydraulic conductivity functions,” Geotechnical Testing Journal, ASTM, 35(1), 2011, A. Wayllace and N. Lu.
“Automated humidity system for measuring total suction characteristics of clay,” Geotechnical Testing Journal, ASTM, 26(2), 2003, W.J. Likos and N. Lu.
“Automated measurement of total suction characteristics in the high suction range: application to the assessment of swelling potential,” Transportation Research Record (1755), 2001, W.J. Likos and N. Lu.
"A closed-form equation for effective stress in variably saturated soil," Water Resources Research, 46, doi:10.1029/2009WR008646, 2010, Lu, N., J. W. Godt, and D. Wu.
"Analysis of rainfall-induced slope instability using a field local factor of safety," Water Resources Research, 48, W09524,, 2012, Lu, N., B. Sener, A. Wayllace, and J. W. Godt.
"Characterization of compacted silty sand Using a double walled triaxial cell With fully automated relative-humidity control," Geotechnical Testing Journal, 10.1520/GTJ20150156, 2016, Patil, U.D., L. Hoyos, A. Puppala.