1. Determination of the greatest height consistent with stability that a vertical pole or mast can be made and of the greatest height to which a tree of given proportions can grow;Greenhill,1881
2. Theory of Elastic Stability;Grishcoff,1961
3. Stability of a heavy column with an end load;Wang;J. appl. Mech. ASME,1981
4. Buckling and postbuckling of a long hanging elastic column due to a bottom load;Wang;J. appl. Mech. ASME,1983
5. C. Y. Wang, Approximate formulas for the buckling of a heavy column with an end load. J. Engng Mech., ASCE (submitted).