Bulgaria's unit of currency is the lev (pl., leva). The ISO 4217 currency code for the new Bulgarian lev is BGN. The Bulgarian lev is anyway bound to the euro. "Cy-Fi" Finch, who teaches Lev street smarts. Lev. 26&colon;41, "their uncircumcised hearts"; compare Jer. Psychological tools are one of the key concepts in Lev Vygotsky's sociocultural perspective. Third Space theory emerges from the sociocultural tradition in psychology identified with Lev Vygotsky. Feynman provided a quantum-mechanical explanation for the Soviet physicist Lev Landau's theory of superfluidity. It was built by the architects Alexander Yakovlev, Lev Rudnev and Vladimir Munts. Ashkenazy attended the Moscow Conservatory where he studied with Lev Oborin and Boris Zemliansky. Novak has two younger brothers, Jesse, a composer, and Lev. He was husband of Anna Akhmatova and father of Lev Gumilev. In another passage, commenting on Lev. xxiv. Throughout all the Land unto all the Inhabitants Thereof Lev. The fable appears in the 1933 Russian novel "The German Quarter" by Lev Nitoburg.