1. B. Berndtsson, $$ \bar \partial $$ and Schrödinger operators, Math. Z. 221 (1996), 401–413.
2. H.P. Boas and E.J. Straube, Global regularity of the $$ \bar \partial $$ -Neumann problem: a survey of the L 2-Sobolev theory, Several Complex Variables (M. Schneider and Y.-T. Siu, eds.) MSRI Publications, vol. 37, Cambridge University Press, 1999, pg. 79–111.
3. P. Bolley, M. Dauge and B. Helffer, Conditions suffisantes pour l’injection compacte d’espace de Sobolev à poids, Séminaire équation aux dérivées partielles (France), vol.1, Université de Nantes (1989), 1–14.
4. D.W. Catlin, Global regularity of the $$ \bar \partial $$ -Neumann problem, Proc. Symp. Pure Math. 41 (1984), 39–49
5. D. Catlin and J. D’Angelo, Positivity conditions for bihomogeneous polynomials, Math. Res. Lett. 4 (1997), 555–567.