@article{10_4153_CMB_1987_022_1, author = {Gilkey, Peter B.}, title = {The {Eta} {Invariant} and {Non-Singular} {Bilinear} {Products} on {Rn}}, journal = {Canadian mathematical bulletin}, pages = {147--154}, year = {1987}, volume = {30}, number = {2}, doi = {10.4153/CMB-1987-022-1}, url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1987-022-1/} }