@article{10_4064_fm_102_1_61_72,
     author = {Vo-Thanh Liem},
     title = {Homotopy characterization of weakly flat knots},
     journal = {Fundamenta Mathematicae},
     pages = {61--72},
     publisher = {mathdoc},
     volume = {102},
     number = {1},
     year = {1979},
     doi = {10.4064/fm-102-1-61-72},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-102-1-61-72/}
}