Nonsymmetric Examples: Benites-Kriz                                             
 Eigen-values (Principal stresses) 
  0.417E+01  0.102E+02 -0.103E+02
  0.114E+01  0.829E+01  0.126E+02
  0.374E+01  0.988E+01 -0.962E+01
  0.205E+01  0.936E+01  0.106E+02