@article{10_4064_aa108_2_5,
     author = {Lekbir Chakri and El Mostafa Hanine},
     title = {Anisotropic forms modulo $p^2$},
     journal = {Acta Arithmetica},
     pages = {147--151},
     publisher = {mathdoc},
     volume = {108},
     number = {2},
     year = {2003},
     doi = {10.4064/aa108-2-5},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa108-2-5/}
}