On the best values of the constants in the theorem of M. Riesz, Zygmund and Kolmogorov S. Pichorides — 1972 Studia Mathematica
On a Conjecture of Littlewood Concerning Exponentials Sums, II S. K. Pichorides — 1978 Δελτίο της Ελληνικής Μαθηματικής Εταιρίας
On a Conjecture of Littlewood Concerning Exponential Sums, I S. K. Pichorides — 1977 Δελτίο της Ελληνικής Μαθηματικής Εταιρίας
A note on the Littlewood-Paley square function inequality S. K. Pichorides — 1990 Colloquium Mathematicae
On the L 1 norm of exponential sums S. K. Pichorides — 1980 Annales de l'institut Fourier The L 1 norm of a trigonometric polynomial with N non zero coefficients of absolute value not less than 1 exceeds a fixed positive multiple of C ( log N ) / ( log log N ) 2 .