Geodesic
Effective construction of nondegenerate Hermitian-positive functions of several variables
Funkcionalʹnyj analiz i ego priloženiâ, Tome 14 (1980) no. 4, pp. 55-60 
L. A. Sakhnovich. Effective construction of nondegenerate Hermitian-positive functions of several variables. Funkcionalʹnyj analiz i ego priloženiâ, Tome 14 (1980) no. 4, pp. 55-60. http://geodesic.mathdoc.fr/item/FAA_1980_14_4_a6/
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     title = {Effective construction of nondegenerate {Hermitian-positive} functions of several variables},
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     volume = {14},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1980_14_4_a6/}
}
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