@article{1103036711,
author = {Freeman, Robert S.},
title = {Closed extensions of the Laplace operator determined by a general class of boundary conditions, for unbounded regions.},
journal = {Pacific J. Math.},
volume = {12},
number = {4},
year = {1962},
pages = { 121-135},
language = {en},
url = {http://dml.mathdoc.fr/item/1103036711}
}
Freeman, Robert S. Closed extensions of the Laplace operator determined by a general class of boundary conditions, for unbounded regions.. Pacific J. Math., Tome 12 (1962) no. 4, pp. 121-135. http://gdmltest.u-ga.fr/item/1103036711/