@book{21453,
	author = {Obridko, Vladimir N.  and Georgieva, Katya },
	title = {The Sun: New Challenges},
	publisher = {Springer Berlin Heidelberg},
	year = {2012},
	series = {Astrophysics and Space Science Proceedings},
	address = {Heidelberg, Berlin},
	url = {http://doi.org/10.1007/978-3-642-29417-4}
}