1. Bannai, E.: Positive definite unimodular lattices with trivial automorphism groups, Mem. Am. Math. Soc. 85, 429 (1990)
2. Böcherer, S., Nagaoka, S.: On mod p properties of Siegel modular forms. Math. Ann. 338, 421–433 (2007)
3. Böcherer, S., Kikuta, T.: On mod $$p$$ p singular modular forms, (preprint, 2013)
4. Conway, J.H., Curtis, R.T., Norton, S.P., Parker, R.A., Wilson, R.A.: Atlas of finite groups. In: Proceedings of Maximal Subgroups and Ordinary Characters for Simple Groups. With Computational Assistance from J. G. Thackray. Oxford University Press, Eynsham (1985)
5. Eichler, M.: Note zur Theorie der Kristallgitter. Math. Ann. 125, 51–55 (1952)