John Warnaby. Per Norgaard: Remembering Child for Viola and Orchestra; In between for Cello and Orchestra by Pinchas Zukerman, Morton Zeuthen, Danish Radio Symphony Orchestra, Jorma Panula, Per Norgaard. Tempo (Review article)使用|format=需要含有|url= (帮助). 1992年6月,. New Ser., No. 181 (Scandinavian Issue): 35+37–38. ISSN 0040-2982.使用|accessdate=需要含有|url= (帮助)