Isospectral flat connexions are constructed for higher rank bundlesover compact Riemann surfaces
@article{16758, title = {Isospectral flat connexions}, journal = {Boletim da Sociedade Paranaense de Matem\'atica}, volume = {31}, year = {2013}, doi = {10.5269/bspm.v31i2.16758}, language = {EN}, url = {http://dml.mathdoc.fr/item/16758} }
Rau, S. Srinivas; Reddy, Sudhamsh. Isospectral flat connexions. Boletim da Sociedade Paranaense de Matemática, Tome 31 (2013) . doi : 10.5269/bspm.v31i2.16758. http://gdmltest.u-ga.fr/item/16758/