The space BV (S 2 ,S 1 ) : minimal connection and optimal lifting
Annales de l'I.H.P. Analyse non linéaire, Tome 22 (2005) no. 3, pp. 283-302. 
@article{AIHPC_2005__22_3_283_0,
     author = {Ignat, Radu},
     title = {The space $\mathrm {BV}({S}^{2},{S}^{1})$ : minimal connection and optimal lifting},
     journal = {Annales de l'I.H.P. Analyse non lin\'eaire},
     pages = {283--302},
     publisher = {Elsevier},
     volume = {22},
     number = {3},
     year = {2005},
     doi = {10.1016/j.anihpc.2004.07.003},
     mrnumber = {2136245},
     zbl = {1083.49030},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/j.anihpc.2004.07.003/}
}
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Ignat, Radu. The space $\mathrm {BV}({S}^{2},{S}^{1})$ : minimal connection and optimal lifting. Annales de l'I.H.P. Analyse non linéaire, Tome 22 (2005) no. 3, pp. 283-302. doi : 10.1016/j.anihpc.2004.07.003. http://www.numdam.org/articles/10.1016/j.anihpc.2004.07.003/

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