@article{10_4064_sm165_1_7,
     author = {Michael A. Coco},
     title = {Biorthogonal systems in {Banach} spaces},
     journal = {Studia Mathematica},
     pages = {81--100},
     year = {2004},
     volume = {165},
     number = {1},
     doi = {10.4064/sm165-1-7},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm165-1-7/}
}