Geodesic
On arithmetic properties of the values of hypergeometric functions
Sbornik. Mathematics, Tome 72 (1992) no. 1, pp. 267-286

Voir la notice de l'article provenant de la source Math-Net.Ru

The author proposes an effective method of constructing a linear approximating form for a hypergeometric function of general type and its derivatives, which has a zero of the maximal possible order at $z=0$. This construction is applied to the study of arithmetic properties of values of these functions at points of an imaginary quadratic field. 
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     title = {On arithmetic properties of the values of hypergeometric functions},
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P. L. Ivankov. On arithmetic properties of the values of hypergeometric functions. Sbornik. Mathematics, Tome 72 (1992) no. 1, pp. 267-286. http://geodesic.mathdoc.fr/item/SM_1992_72_1_a13/