The rights of the artist after the sale of paintings

[Seriy]

I like a beginner (more precisely, who had taken up the brush after years of interruption) artist. Planned year-second only to play, and then you find out about their prospects. But it so happened that my sketches are willing to work. And in this regard, I formed the question, which I do not know where to find the answer. I think that here.

What rights do the artist after selling his paintings? Is it right to repeat it? Does the right to use the photo to sell the painting for publications, catalogs, in general, printed materials (eg, a picture of my recently became the cover CD)? What all this is regulated? Laws? Where Used glance patterns Sales agreements with the division of these rights?

Thanks for any comments.