If you use sparseLM in your published work, you should include a reference to the following paper (bibtex entry):
@inproceedings{lourakis10, author = {Manolis I.A. Lourakis}, title = {Sparse Non-linear Least Squares Optimization for Geometric Vision}, booktitle = {European Conference on Computer Vision}, volume = {2}, year = {2010}, pages = {43-56}, doi = {http://dx.doi.org/10.1007/978-3-642-15552-9_4}, }