Lumbar laminectomy alone or with instrumented or noninstrumented arthrodesis in degenerative lumbar spinal stenosis. - Katz,J.N.; Lipson,S.J.; Lew,R.A.; Grobler,L.J.; Weinstein,J.N.; Brick,G.W.; Fossel,A.H.; Liang,M.H. (Spine, 1997)