Biography focused on his religious music, particularly the Requium (1981) with photograph and discography from Dacapo Records.

Brief biographical sketch focused on his church music with choral and vocal discography from Naxos.

Biography showing his work composing for the Catholic church and his secular evolution from modality to serialism from the Grove Concise Dictionary of Music entry at WQXR radio.

Chart from woodwind.org examining his work for clarinet with links for comparison to others' similar pieces.