no. 2
Energy spectrum of certain harmonic mappings
Compositio Mathematica, Tome 56 (1985) no. 2, pp. 153-170. 
@article{CM_1985__56_2_153_0,
     author = {Adachi, Toshiaki and Sunada, Toshikazu},
     title = {Energy spectrum of certain harmonic mappings},
     journal = {Compositio Mathematica},
     pages = {153--170},
     publisher = {Martinus Nijhoff Publishers},
     volume = {56},
     number = {2},
     year = {1985},
     mrnumber = {809864},
     zbl = {0578.58009},
     language = {en},
     url = {http://archive.numdam.org/item/CM_1985__56_2_153_0/}
}
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%A Sunada, Toshikazu
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Adachi, Toshiaki; Sunada, Toshikazu. Energy spectrum of certain harmonic mappings. Compositio Mathematica, Tome 56 (1985) no. 2, pp. 153-170. http://archive.numdam.org/item/CM_1985__56_2_153_0/

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