1. Andreotti, A., Hill, C.D.: E. E. Levi convexity and the Hans Lewy problem I. Ann. Sc. Norm. Super. Pisa Sci. Fis. Mat. III 26, 325–363 (1972)
2. Andreotti, A., Hill, C.D.: E. E. Levi convexity and the Hans Lewy problem II. Ann. Sc. Norm. Super. Pisa Sci. Fis. Mat. III 26, 747–806 (1972)
3. Bochner, S.: Analytic and meromorphic continuation by means of Green’s formula. Ann. Math. 44, 652–673 (1943)
4. Boggess, A.: $$CR$$ Manifolds and the Tangential Cauchy-Riemann Complex. CRC Press, Boca Raton (1991)
5. Boggess, A., Dwilewicz, J. R., Slodkowski, Z.: Hartogs phenomenon on unbounded domains-conjectures and examples. In: Boivin, A., et al. (eds.) Complex Analysis and Potential Theory. CRM Proceedings and Lecture Notes, vol. 55, pp. 117–134. American Mathematical Society, Providence (2012)