C., M. (April 1953). "Review of Michael Haydn: Ein Vergessener Meister by Hans Jancik". Music & Letters. 34 (2). Oxford University Press: 160–161. JSTOR730844.
Wolfgang Amadeus Mozart to Leopold Mozart, July 9, 1778, in Mozart Letters and Documents – Online Edition, Stiftung Mozarteum Salzburg, accessed February 18, 2025, https://dme.mozarteum.at/DME/briefe/letter.php?mid=1026&cat=. Wolfgang wrote to his father: "I had to laugh heartily over Haydn’s drunkenness—if I had been there, I would certainly have whispered Adlgasser quietly into his ear—it is indeed scandalous when such a skilful man, through his own fault, renders himself inert in doing his duty—in a function which is to the glory of God—when the Archbishop and the whole court is present—the whole church full of people—that is disgusting—this is also one of the main things that makes me hate Salzburg—the coarse, roguish and dissolute court musicians—indeed, an honest man who has learned manners cannot live with them;—he must, in fact, far from being able to befriend them, be ashamed of them!"
