@article{10_1090_S0894_0347_1995_1273414_4,
     author = {Friedman, Robert},
     title = {Vector bundles and {\dh}‘†{\dh}‘‚(3)-invariants for elliptic surfaces},
     journal = {Journal of the American Mathematical Society},
     pages = {29--139},
     publisher = {mathdoc},
     volume = {08},
     number = {1},
     year = {1995},
     doi = {10.1090/S0894-0347-1995-1273414-4},
     url = {http://geodesic.mathdoc.fr/articles/10.1090/S0894-0347-1995-1273414-4/}
}