I thought I'd add this information, available from RILM (https://rme.rilm.org/article?id=bvc05825&v=1.0&rs=bvc05825):
"Concerto for violin and orchestra No.1 in D minor. Opus 50. (1994) Duration: 31 min. I. Moderato; II. Adagio; III. Finale: Allegro con brio. Score: Kryptos-Verlag. World premiere: 02.05.1997 (piano version: Krueger, Veit) and 05.03.2002 (orchestral version: Mertes, Oldenburger Staatsorchester, Rumpf)"
Ah I see, already covered here (https://www.unsungcomposers.com/forum/index.php?topic=785.15).