1. Molecular Model-Building by Computer
2. Johnson, C. K. ORTEP − A FORTRAN thermal ellipsoid plot program for crystal structure illustrations. Report ORNL-3794, Revised, Oak Ridge National Laboratory, Oak Ridge, TN, 1965; p 70.
3. Crystal structure of triindenylsamarium
4. Motherwell, W. D. S.; Clegg, W.PLUTO: Program for Plotting Molecularand Crystal Structures; Cambridge University Press: Cambridge, England, 1978.