Boggess, A., R. J. Dwilewicz, and Z. Slodkowski. “Hartogs-Type Extension for Unbounded Sets in C^2 via Construction of Riemann domains ”. ANNALI SCUOLA NORMALE SUPERIORE - CLASSE DI SCIENZE, vol. 17, no. 1, Mar. 2017, pp. 93-111, doi:10.2422/2036-2145.201502_003.