Direct solution of the inverse optimization problem of load sharing   between muscles
  In the context the statically indeterminate muscular load sharing problem considered in biomechanics of the musculoskeletal system, a method is suggested of constructing an additively separable and homogenous cost function based on a solution to a linearly constrained optimization problem involving this cost function. The construction makes use of the Koenigs solution of Schroeder's functional equation. 
Adam Siemienski