How many numbers satisfy the 3 x + 1 conjecture? Krasikov, I. — 1989 International Journal of Mathematics and Mathematical Sciences
A note on the vertex-switching reconstruction. Krasikov, I. — 1988 International Journal of Mathematics and Mathematical Sciences
Zero-sum partition theorems for graphs. Caro, Y.; Krasikov, I.; Roditty, Y. — 1994 International Journal of Mathematics and Mathematical Sciences