no. 2
Immersed surfaces with constant curvature near infinity
Compositio Mathematica, Tome 36 (1978) no. 2, pp. 131-143. 
@article{CM_1978__36_2_131_0,
     author = {Bleecker, David D.},
     title = {Immersed surfaces with constant curvature near infinity},
     journal = {Compositio Mathematica},
     pages = {131--143},
     publisher = {Sijthoff et Noordhoff International Publishers},
     volume = {36},
     number = {2},
     year = {1978},
     mrnumber = {515042},
     zbl = {0374.53002},
     language = {en},
     url = {http://archive.numdam.org/item/CM_1978__36_2_131_0/}
}
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Bleecker, David D. Immersed surfaces with constant curvature near infinity. Compositio Mathematica, Tome 36 (1978) no. 2, pp. 131-143. http://archive.numdam.org/item/CM_1978__36_2_131_0/

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