TITLE: congruences for Fourier coefficients of modular forms
QUESTION [6 upvotes]: Are there other good articles on congruences for Fourier coefficients of modular forms beside Swinnerton-Dyer's article in "Modular Functions of One Variable III"?
I am looking for generalisations and other explicit cases than the Ramanujan $\tau$-function and the $5$ other modular forms in [Swinnerton-Dyer].

REPLY [2 votes]: Also, have a look at Ken Ono's The Web of Modularity: 
Arithmetic of the Coefficients of Modular Forms and Q-Series. This book is full of what you are looking for.