Glaring examples of OR per WP:SYN or may be an incidental mistake - 3
In article
The number of UPA fighters varied. A German Abwehr report from November 1943 estimated that UPA had 20,000 soldiers;[10] other estimates at that time placed the number at 40,000.[11]
By the summer of 1944, estimates of UPA membership varied from 25-30 thousand fighters[12] up to 100,000 soldiers.[11]

So I hope what here will be provided page Number for  40,000. While, using the WP:Guidelines  such sentence should be presented as follows:

The number of UPA fighters varied by source and time of estimation. A German Abwehr report from November 1943 estimated that UPA had 20,000 soldiers;[10] Magoci, Paul in his 1996 work estimates at that time placed the number at 40,000.[11] 
By the mid  of 1944 -time of OUN/UPA maximum strength- , Ukrainian Academy of Sciences  and other scholars  estimates of OUN/UPA membership not higher then 30 thousand fighters[12] and mentioned what Nazi’s info about 80-90 thousand fighters as fantasy ;[ Magoci, Paul in his 1996 work estimated such as high as 100,000 soldiers.[11]
, similar to Macosi  figure also appeared at 1952 OUN propaganda statement.