 Her doctoral thesis dealt with some of the problems concerning the right to treat a contract as of sale of goods as discharged – the right of rescission – in various situations that may rise in the course of performance.Focus was put on those special considerations relevant to the right of rescission which depended on how far performance had proceeded when the question of rescission came up.Five years later, in 1975, Anna Christensen was appointed Professor in Private Law at the Faculty of Law at Lund University.