Vestfrid I A

Publications in Math-Net.Ru

1. Any separable ultrametric space can be isometrically imbedded in $l_2$
   
   Funktsional. Anal. i Prilozhen., 17:1 (1983),  85–86
2. On a universal property of Hilbert spaces
   
   Dokl. Akad. Nauk SSSR, 246:3 (1979),  528–530