no. 3
A new approach to the Ricci flow on S 2
Annali della Scuola Normale Superiore di Pisa - Classe di Scienze, Série 4, Tome 21 (1994) no. 3, pp. 475-482 
@article{ASNSP_1994_4_21_3_475_0,
     author = {Bartz, J. and Struwe, M. and Ye, R.},
     title = {A new approach to the {Ricci} flow on $S^2$},
     journal = {Annali della Scuola Normale Superiore di Pisa - Classe di Scienze},
     pages = {475--482},
     year = {1994},
     publisher = {Scuola normale superiore},
     volume = {Ser. 4, 21},
     number = {3},
     zbl = {0818.53050},
     language = {en},
     url = {https://www.numdam.org/item/ASNSP_1994_4_21_3_475_0/}
}
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Bartz, J.; Struwe, M.; Ye, R. A new approach to the Ricci flow on $S^2$. Annali della Scuola Normale Superiore di Pisa - Classe di Scienze, Série 4, Tome 21 (1994) no. 3, pp. 475-482. https://www.numdam.org/item/ASNSP_1994_4_21_3_475_0/

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