Author:Soreng, R.J. Treatments CChen2006a FFinot2004a GGillespie2005a Gillespie2006a KKnot2004a PPeterson1999a Peterson2001c SSaarela2003a Soreng1985a S cont.Soreng1990a Soreng1990b Soreng1991a Soreng1991b Soreng1993a Soreng1997a Soreng1998a Soreng1998b Soreng1998c S cont.Soreng1998d Soreng1998e Soreng2000a Soreng2001a Soreng2003a Soreng2003b Soreng2005a