The geometry of the period mapping on cyclic covers of P1
Compositio Mathematica, Tome 51 (1984) no. 1, p. 131-147 
@article{CM_1984__51_1_131_0,
     author = {Riera, Gonzalo},
     title = {The geometry of the period mapping on cyclic covers of P1},
     journal = {Compositio Mathematica},
     publisher = {Martinus Nijhoff Publishers},
     volume = {51},
     number = {1},
     year = {1984},
     pages = {131-147},
     zbl = {0542.14017},
     mrnumber = {734789},
     language = {en},
     url = {http://http://www.numdam.org/item/CM_1984__51_1_131_0}
}

Riera, Gonzalo. The geometry of the period mapping on cyclic covers of P1. Compositio Mathematica, Tome 51 (1984) no. 1, pp. 131-147. http://www.numdam.org/item/CM_1984__51_1_131_0/

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