1. J. Jost, Postmodern Analysis (Springer, Berlin, Heidel
berg, 1998)#
2. W. P. Ziemer, Weakly Differentiable Functions
(Springer, 1989)#
3. A. K. Nandakumaran, P. S. Datti, Partial Differential
Equations, Classical Theory with a Modern touch
(Cambridge University Press, 2020)#
4. J. P. Gossez, Bull. de la Classe des sc. 67 (1981)#
5. B. Heidergott and X. R. Cao, IEEE Trans. Automat.
Contr. 47, 7 (2002)#
6. A. Eikmier, E. Emmerich, E. Schöll, Int. J. Dynam.
Control, 6 (2018)#
7. G. B. Lieberman, Oblique Derivative Problems for
Elliptic Equations (World Scientific, 2013)#
8. P. A. M. Dirac, The Principle of quantum mechanics,
Fourth Edition (Oxford university press, 1957)#
9. Q. Teschi, Mathematical methods in Quantum mechan
ics, with applications to Schrödinger operators (Amer
ican Mathematical Society, 2014)#
10. F. Gieres, Rep. . Prog. in Phy. 63, 12 (2001).#
11. M. Valter, Int. J. Geom. Meth. Mod. Phys. 13 (2016)#
12. H Brezis, Functional analysis, Sobolev spaces and
partial differential equations (Springer, 2011).#
13. M. Jafari Matehkolaee, Pramana J. Phys. 95 (2021).#
14. M. Jafari Matehkolaee, Z. Norouzbeh, Trans. Th.
Math. Phy. 1, (2) 2024#