Congruences relating to the sums of products of the first n numbers and to other sums of products.
J.W.L. Glaisher, The Quarterly Journal of Pure and Applied Mathematics, 1900, pg 1-35
On the residues of sums od products of the first p-1 numbers, and their powers, to the modulus p^2 or p^3.
J.W.L. Glaisher, The Quarterly Journal of Pure and Applied Mathematics, 1900, pg 321-353
On congruences involving Bernoulli numbers and the quotients of Fermat and Wilson, by Emma Lehmer, Annals of Mathematics, Vol 39,n°2, April 1938, pg 350-360
Euler E228 : De numeris qui sunt aggregata duorum quadratorum
Morley's congruence theorem : 2^(4n) \equiv (-)^n (2b)! / (n!)^2