Selected Students of Leopold Auer (PDF. Thesis by Ruth Elizabeth Rodrigues for PhD, University of Birmingham, 2009; some brief mentions of Schnirlin and 2 pages specifically about him - which seems to be more than he receives anywhere else - on (thesis) pp.50–51. Mentions that he premiered Reger's Suite im Alten Stil in Berlin (piano-accompanied or orchestral version?). Schnirlin's 1923 treatise The New Way for Mastering the Violin’s Entire Literature on violin-playing is discussed in relation to others' quite a few times in the thesis however, with specific music examples from it. If he left any recordings, none seem to have survived.