@article{10_1090_S0894_0347_1990_1040197_8,
     author = {Simpson, Carlos T.},
     title = {Harmonic bundles on noncompact curves},
     journal = {Journal of the American Mathematical Society},
     pages = {713--770},
     year = {1990},
     volume = {03},
     number = {3},
     doi = {10.1090/S0894-0347-1990-1040197-8},
     url = {http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-1990-1040197-8/}
}