APA-viite

Hajek, P. (2008). Biorthogonal systems in banach spaces.

Chicago-tyylinen lähdeviittaus

Hajek, Petr. Biorthogonal Systems in Banach Spaces. Springer Science Business Media,LLC, 2008.

MLA-viite

Hajek, Petr. Biorthogonal Systems in Banach Spaces. 2008.