[Hadel]

@Iphinome

It is not babel fish translation :-)

As I understand it, you do not have to own the originals. The requirement is that they are already published, not owned.
A library does not have to be a formal institution in a brick and mortar building, only that it needs to be accessible by the public.
I don't say it was the intention of the law, but this is what the text says. {Edit}And I am pretty good in my mother tongue, plus not a complete amateur to law{/Edit}

At the end it doesn't matter how we understand it but how a judge would rule. :-)

@Geppetto
Not really. It is 100% reasonable. If EU was one single country, there would be one single law and NO LOCAL laws. It is not the case. True - each country is supposed/obliged to follow the EU regulations, however it does not mean all do it 100% accurately and 100% on time.
My guess is that Bulgaria did not update (properly) the copy right law. Which means nothing - the citizens must follow ONLY the current WRITTEN law in the country where they reside. So arguments for the situation in another country or the future or possible lawmaker intentions are the one that are NONSENSE.

BTW, about
You are not allowed to make a reproduction (even partial) of a copyrighted work
I am almost sure you are allowed to quote a book (partial reproduction) anywhere in the world.