@article{10_4064_aa_65_3_249_258,
     author = {Erik Dofs},
     title = {On extensions of 1 chains},
     journal = {Acta Arithmetica},
     pages = {249--258},
     publisher = {mathdoc},
     volume = {65},
     number = {3},
     year = {1993},
     doi = {10.4064/aa-65-3-249-258},
     language = {fr},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa-65-3-249-258/}
}