Khadshiivanov N, Pashov I. Ramsey multiplicity M(3,6) is 2. Ann. Sofia Univ. Fac. Math. and Inf. [Internet]. 1992 Dec. 12 [cited 2024 Nov. 22];83(1):17-28. Available from: https://annual.uni-sofia.bg/index.php/fmi/article/view/480