An extension of a result of H. Hopf to Kähler submanifolds of ℝ n
Rendiconti del Seminario Matematico della Università di Padova, Tome 94 (1995), pp. 11-15. 
@article{RSMUP_1995__94__11_0,
     author = {Ferreira, Maria J. and Rigoli, Marco and Tribuzy, Renato},
     title = {An extension of a result of {H.} {Hopf} to {K\"ahler} submanifolds of $\mathbb {R}^n$},
     journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova},
     pages = {11--15},
     publisher = {Seminario Matematico of the University of Padua},
     volume = {94},
     year = {1995},
     mrnumber = {1370898},
     zbl = {0849.53042},
     language = {en},
     url = {http://archive.numdam.org/item/RSMUP_1995__94__11_0/}
}
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Ferreira, Maria J.; Rigoli, Marco; Tribuzy, Renato. An extension of a result of H. Hopf to Kähler submanifolds of $\mathbb {R}^n$. Rendiconti del Seminario Matematico della Università di Padova, Tome 94 (1995), pp. 11-15. http://archive.numdam.org/item/RSMUP_1995__94__11_0/

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