. . "Antonova"@en . "Helene A. Antonova" . . "Helene A." . . "Antonowa" . "1973" . "Antonowa" . . "Helena Antonova" . . "Antonova"@fr-FR . . "Helena" . "Elena Antonowa" . "Elena Antonova"@en . "1898" . "Antonova" . "Elena"@en .