@article{CRMATH_2010__348_11-12_601_0,
     author = {Ohkubo, Shun},
     title = {A ring of periods for {Sen} modules in the imperfect residue field case},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {601--603},
     publisher = {Elsevier},
     volume = {348},
     number = {11-12},
     year = {2010},
     doi = {10.1016/j.crma.2010.04.020},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/j.crma.2010.04.020/}
}