Remove some whitespace from lintools.  :-p
Data from Chuong, Fung (1983) in invariant form

Each model is converted to (c,M,LL), where M is the list of invariant
"shear moduli" and LL is a symmetric matrix of "lambdas"

W = M[i]*(A[i]:E^2) + LL[i,j]*(A[i]:E)*(A[j]:E)