@article{JFAA_2001__7_4_59701,
     author = {Marcela Sanmartino},
     title = {The {Calder\'on} {Projector} for an {Elliptic} {Operator} in {Divergence} {Form.}},
     journal = {The journal of Fourier analysis and applications [[Elektronische Ressource]]},
     pages = {615--632},
     publisher = {mathdoc},
     volume = {7},
     number = {4},
     year = {2001},
     zbl = {1137.35350},
     url = {http://geodesic.mathdoc.fr/item/JFAA_2001__7_4_59701/}
}