Ariel, i gather that we have had a cross post issue.The Streltsy and the musket rest purpose were illutrated and mentioned in my previous post. On the other hand, i wouldn't know of A.B. Viscovatov's work (no surprise, i am no great reader) but, according to Bashford Dean's "Notes on Arms and Armor", this type of weapon was around all Europe before the 1400's.
... And apparently the Swis made good use of it at Montgarte (1315) and Sempach (1386).
... Further back, in Psalter Hours of Guiluys by Boisleux (1246-1250), this type (type) of weapon is illustrated.
All in all, i find it hard to digest that the Bardiche is an Ottoman weapon.
But then ... what do i know ?