%0 Journal Article %A Jan Moser %T Jacob's ladders, interactions between $\zeta $-oscillating systems, and a $\zeta $-analogue of an elementary trigonometric identity %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 2017 %P 203-218 %V 299 %I mathdoc %U http://geodesic.mathdoc.fr/item/TM_2017_299_a12/ %G ru %F TM_2017_299_a12