no. 2
Semicontinuity and relaxation properties of a curvature depending functional in 2D
Annali della Scuola Normale Superiore di Pisa - Classe di Scienze, Série 4, Tome 20 (1993) no. 2, pp. 247-297. 
@article{ASNSP_1993_4_20_2_247_0,
     author = {Bellettini, G. and Dal Maso, G. and Paolini, M.},
     title = {Semicontinuity and relaxation properties of a curvature depending functional in {2D}},
     journal = {Annali della Scuola Normale Superiore di Pisa - Classe di Scienze},
     pages = {247--297},
     publisher = {Scuola normale superiore},
     volume = {Ser. 4, 20},
     number = {2},
     year = {1993},
     mrnumber = {1233638},
     zbl = {0797.49013},
     language = {en},
     url = {http://www.numdam.org/item/ASNSP_1993_4_20_2_247_0/}
}
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Bellettini, G.; Dal Maso, G.; Paolini, M. Semicontinuity and relaxation properties of a curvature depending functional in 2D. Annali della Scuola Normale Superiore di Pisa - Classe di Scienze, Série 4, Tome 20 (1993) no. 2, pp. 247-297. http://www.numdam.org/item/ASNSP_1993_4_20_2_247_0/

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