Note: Twin brother of Igor Bogdanoff. Wikipedia-EN states "Since 1991, they sign their books as Bogdanoff, preferring "ff" to "v".", although cover images for books prior to 1991 also show the "ff" form. A series of 1987 French translations of Doctor Who novelisations (Garancière - Docteur Who) have covers stating "Igor et Grichka Bogdanoff présentent", but this appears to be based on their hosting of a TV show that included episodes of Doctor Who, rather than any direct contribution to those publications.