Williams, Gareth: Dictionary of weeds of Eastern Europe. Their common names and importance in Latin, Albanian, Bulgarian, Czech, German, English, Greek, Hungarian, Polish, Romanian, Russian, Serbo-Croat and Slovak (Budapest, 1987)
Williams, Gareth: Dictionary of weeds of Eastern Europe. Their common names and importance in Latin, Albanian, Bulgarian, Czech, German, English, Greek, Hungarian, Polish, Romanian, Russian, Serbo-Croat and Slovak (Budapest, 1987)