1. Araujo, J., Bratten, T.: On the spectrum of the Johnson graphs
$${J}(n,k,r)$$
J
(
n
,
k
,
r
)
. In: Proceedings of the XXIIrd “Dr. Antonio A. R. Monteiro” Congress, 2016, Univ. Nac. Sur Dep. Mat. Inst. Mat., Baha Blanca, pp. 57–62 (2015)
2. Cambridge Tracts in Mathematics;EF Assmus Jr,1992
3. Bosma, W., Cannon, J., Playoust, C.: The Magma algebra system I: the user language. J. Symb. Comput. 24(3/4), 235–265 (1997)
4. Brouwer, A.E., van Eijl, C.J.: On the
$$p$$
p
-rank of the adjacency matrices of strongly regular graphs. J. Algebr. Comb. 1, 329–346 (1992)
5. Brouwer, A.E., Haemers, W.H.: Association schemes. In: Graham, R.L., Grötschel, M., Lovász, L. (eds.) Handbook of Combinatorics, Chapter 15, vol. 1, pp. 749–771. Elsevier, MIT, Cambridge (1995)