Finally, study from Serbia and Montenegro.
It shows expected percents for Serbia, but I must admit that I am quite surprised for the results from Montenegro and high percent of E1b. On the other side it is understandable, because of Montenegro bordering with E1b peak regions: Kosovo and northern Albania.
So, according to this study, difference between Serbia and Montenegro is ratio I2a:E1b.
In Serbia 2:1
In Montenegro 1:1.
Also interesting question would be, who are I1 people in Serbia and Montenegro.
There is, for example 7,82% of I1 , and only 4,5% of R1b in Serbia, making the I1 on the fourth place haplogroup in Serbia after I2a,E1b,R1a.