no. 1
The nonlinear superposition operator acting on Bergman spaces
Compositio Mathematica, Tome 93 (1994) no. 1, pp. 23-35. 
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     number = {1},
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     url = {http://www.numdam.org/item/CM_1994__93_1_23_0/}
}
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Camera, G. A.; Gimenez, J. The nonlinear superposition operator acting on Bergman spaces. Compositio Mathematica, Tome 93 (1994) no. 1, pp. 23-35. http://www.numdam.org/item/CM_1994__93_1_23_0/

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