ELA, Volume 10, pp. 232-239, October 2003, abstract.
Strongly regular graphs: Values of lambda and mu for which there are only
finitely many feasible (v,k,lambda,mu)
Randall J. Elzinga
Given \lambda and \mu, it is shown that, unless one of
the relations
(\lambda-\mu)^2 = 4\mu, \lambda-\mu = -2,
(\lambda-\mu)^2 + 2(\lambda-\mu) = 4\mu
is satisfied, there are only finitely many parameter
sets (v,k, \lambda, \mu) for which a strongly regular
graph with these parameters could exist. This result
is used to prove as special cases a number of results
which have appeared in previous literature.