Tulis a continuation for this paragraph - Esser ogé meunang tujuh medali di ICF Canoe Sprint World Championships kalawan dua emas (K-2 500 m: 1963, 1970), opat pérak (K-1 500 m: 1966
, K-4 500 m: 1963, 1966, 1971), jeung perunggu (K-4 500 m: 1970).