@article{JEMS_2014_16_10_a3,
     author = {Gregory C. Verchota},
     title = {Strongly elliptic linear operators without coercive quadratic forms. {I.} {Constant} coefficient operators and forms},
     journal = {Journal of the European Mathematical Society},
     pages = {2165--2210},
     publisher = {mathdoc},
     volume = {16},
     number = {10},
     year = {2014},
     doi = {10.4171/jems/485},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/jems/485/}
}