TY  - RPRT
TI  - Adaptive nonlinear least-squares solution for constrained or unconstrained minimization problems (subprogram NLSOL)
AU  - W.L. Anderson
PY  - 1982
DO  - 10.3133/ofr8268
UR  - https://pubs.usgs.gov/publication/ofr8268
ID  - ofr8268
ER  -