no. 1
Harmonic maps into a hemisphere
Annali della Scuola Normale Superiore di Pisa - Classe di Scienze, Série 4, Tome 12 (1985) no. 1, pp. 81-90. 
@article{ASNSP_1985_4_12_1_81_0,
     author = {Giaquinta, Mariano and Sou\v{c}ek, J.},
     title = {Harmonic maps into a hemisphere},
     journal = {Annali della Scuola Normale Superiore di Pisa - Classe di Scienze},
     pages = {81--90},
     publisher = {Scuola normale superiore},
     volume = {Ser. 4, 12},
     number = {1},
     year = {1985},
     zbl = {0599.58017},
     mrnumber = {818802},
     language = {en},
     url = {http://www.numdam.org/item/ASNSP_1985_4_12_1_81_0/}
}
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Giaquinta, M.; Souček, J. Harmonic maps into a hemisphere. Annali della Scuola Normale Superiore di Pisa - Classe di Scienze, Série 4, Tome 12 (1985) no. 1, pp. 81-90. http://www.numdam.org/item/ASNSP_1985_4_12_1_81_0/

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