@article {2015,
	title = {Translation and adaptation of Birman{\textquoteright}s paper "On the theory of self-adjoint extensions of positive definite operators" (1956)},
	number = {SISSA;08/2015/MATE},
	year = {2015},
	institution = {SISSA},
	abstract = {This is an accurate translation from Russian and adaptation to the modern mathematical jargon of a classical paper by M. Sh. Birman published in 1956, which is still today central in the theory of self-adjoint extensions of semi-bounded operators, and for which yet no
English version was available so far.},
	url = {http://urania.sissa.it/xmlui/handle/1963/34443},
	author = {Mikhail Khotyakov and Alessandro Michelangeli}
}
