@article{article33a12328,
title   = {A K-theoretic proof of Boutet de Monvel's index theorem for boundary value problems},
author = {Melo, Severino Toscano do Rego and Schick, Thomas and Schrohe, Elmar},
year = {2006},
doi = {10.1515/crelle.2006.083},
journal   = {Journal fur die Reine und Angewandte Mathematik}
}