@article{10_4007_annals_2010_172_1391,
     author = {Raman Parimala and V. Suresh},
     title = {The $u$-invariant of the function fields  of $p$-adic curves},
     journal = {Annals of mathematics},
     pages = {1391--1405},
     publisher = {mathdoc},
     volume = {172},
     number = {2},
     year = {2010},
     doi = {10.4007/annals.2010.172.1391},
     mrnumber = {2680494},
     zbl = {1208.11053},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4007/annals.2010.172.1391/}
}