1. On the number of real roots of a random algebric equation (III);Littlewood;Mat. USSR Sb.,1943
2. On a lemma of Littlewood and Offord;Erdös;Bull. Amer. Math. Soc.,1945
3. On a lemma of Littlewood and Offord on the distribution of certain sums;Kleitman;Math. Z.,1965
4. On a conjecture of Erdös and a stronger form of Sperner's theorem;Katona;Studia Sci. Math. Hungar.,1966