. . "Igor Gusev" . "Nikolaevich" . "Igor Gusev" . "Igor A. Gusev"@en . . "Igorʹ Ėduardovich Gusev" . "Ėduardovich" . "A."@en . "Igor"@en . . "Gusev, Igorʹ (Igorʹ Ėduardovich)" . . . "Igor'" . "Igorʹ Nikolaevich Gusev" . "Gusev, Igorʹ (Igorʹ Nikolaevich)" . "Igorʹ Gusev" . "Gusev"@en . "Igorʹ" . "Igor' Gusev" .