 Kọ itẹsiwaju fun paragirafi yii - Constantin tun gba ami ẹyẹ mẹjọ ni ICF Canoe Sprint World Championships pẹlu fadaka K-2 500 m: 1977 :  ati idẹ meje K-2 500 m: 1978, 1979, 1981; K-4 500 m: 1974, 1978, 1979, 1983. 