Timoshin, S. I. Investigation of the proton spin at HERA / S. I. Timoshin // Actual Problems of Microworld Physics : Proceedings of International School-Seminar, Gomel, 28 july - 08 august 2003. Vol. 2 / Joint institute for nuclear research ; editors : A. Bogush [et al.]. — Dubna : JINR, 2004. — P. 246-254.