%0 Journal Article %A V. A. Amelkin %T Enumeration problems of oriented serial sequences %J Sibirskij žurnal vyčislitelʹnoj matematiki %D 2008 %P 271-282 %V 11 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/SJVM_2008_11_3_a2/ %G ru %F SJVM_2008_11_3_a2