@article{10_4153_CMB_1993_039_1,
     author = {Helversen-Pasotto, Anna and Sol\'e, Patrick},
     title = {Barnes' {First} {Lemma} and its {Finite} {Analogue}},
     journal = {Canadian mathematical bulletin},
     pages = {273--282},
     year = {1993},
     volume = {36},
     number = {3},
     doi = {10.4153/CMB-1993-039-1},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1993-039-1/}
}