Unknown Bulgarian stickers

[VladeNV]

Anybody know anything about this stickers or what this is? If you have more info please share it

Here says Bulgaria 1991: http://4.bp.blogspot.com/-LVFq8yTFlPQ/Ti8-sIsOn_I/AAAAAAAASHk/y3vgYnyajJk/s1600/Bulgarie+1991.png

And this is sticker of Trifon Ivanov (or maybe some photoshop):
http://2.bp.blogspot.com/-IzcgSffuFgc/Ti87UkpL0LI/AAAAAAAASG4/HehqsePS8fo/s1600/02-Trifon+IVANOV+Panini.png

 

[CSKA Sofia Forever]

I remember these images. What I can tell for sure is that they are not stickers and do not pertain to any album.
I am not sure about the origin of the set, but I can remember that back in the old times such collections were available as cards or pocket-size calendars (sold at the newsstands). There was also a safety matches collection of Bulgarian national team players that was available prior to USA'94 (so this was the squad from 1993 with some prospects for the upcoming World Cup).

There is a single (non-Panini) sticker album with Bulgarian national team players I can recall. It was issued after the 1994 World Cup, and featured around 30 stickers of players in action with a story about the performance of the team at the WC'94.

Unfortunately, I do not have pictures of these collections.