A congruence property of Ramanujan's function $\tau \left( n \right)$

R. P. Bambah, S. Chowla, H. Gupta
1947 Bulletin of the American Mathematical Society  
doi:10.1090/s0002-9904-1947-08870-4 fatcat:j2m4dlp7qrb3hhricsi7kixdpm