An investigation of two date unsupervised classification in the context of a national program for Landsat based forest change mapping. - Donald G. Leckie; Nicholas Walsworth; Jeff Dechka; Mike A. Wulder (IGARSS, 2002)

Automated Individual Tree Isolation on High-Resolution Imagery: Possible Methods for Breaking Isolations Involving Multiple Trees. - Donald G. Leckie; Nicholas Walsworth; François A. Gougeon; Stephen Gray; David Johnson; Laura Johnson; Kathleen Oddleifson; Derrick Plotsky; Victoria Rogers (IEEE J. Sel. Top. Appl. Earth Obs. Remote. Sens., 2016)