Review of the music theatre comedy Gloria: A Pigtale by Paul Hertlendy blends the composer's sense of humor with that of the reviewer.

Sample of the work of Newsday critic Justin Davidson concerning the conducting and composition of H.K. Gruber. Cited by the 2002 Pulitzer Prize committee for his award in criticism.

English translation by Harriett Watts of the HK Gruber vocal work.

Biography noting studies and teachers, instrumental background, and major works from the Grove Concise Dictionary of Music entry at WQXR radio.

Biography by Rudolph Illavsky at the Classical Composers Database notes Gruber's talents in other musical areas, his sense of humor, and membership in die reihe and the Radio Symphony Orchestra of Vienna.

Biography from Intermusica shows him as composer, conductor, singer, and black humorist. Includes biography, repertoire, reviews, contacts, related links, publisher, a shorter English biography, and a German biography.

Introduction to his music by Paul Driver for Boosey & Hawkes. Emphasis given to his dark sense of humor and often unpredictable style.