. . "The Kostrovye Girls are the Soviet Dimension equivalent of the Fireside Girls. They are very similar to The Resistance from the Second Dimension. They first appeared in Phineas & Ferb: Across the Soviet Dimension."@en . . . . . "Kostrovye Girls"@en . . . "The Kostrovye Girls are the Soviet Dimension equivalent of the Fireside Girls. They are very similar to The Resistance from the Second Dimension. They first appeared in Phineas & Ferb: Across the Soviet Dimension."@en . . . . .