1Karl, Frederick R. Doris Lessing in the sixties: The new anatomy of melancholy, Contemporary Literature, 1972 ( 1 ) : 15-33.
2Rubenstein, Roberta. The room of the self: Psychic geography in Doris Lessing' s fiction, Contemporary Literature, 1979 ( 5 ) : 77.
3Greene, Gayle. Bleak house: Doffs Lessing, Margaret Drabble and the condition of England, Forum for Modern Language Studies, 1992 (4) : 304 -319.
4Chaffee, Patricia. Spatial patterns and closed groups in Lessing' s Aftican Stories, South Atlantic Bulletin, 1978 ( 2 ) : 52.
5Sprague, Claire. Without Contraries is no Progression: Lessing' s The Four-Gated City, Modern Fiction Studies, 1980( 1 ) : 99-116.
6Pickering, Jean. Marxism and madness: the two Faces of Doris Lessing' s myth, Modem Fiction Studies, 1980( 1 ) :17-30.
7Budhos, Shirley. The Theme of Enclosure in Selected Works of Doris Lessing, Troy, NY: The Whitston Publishing Company, 1987: ix.
8Snitow, Ann. Houses like machines, cities Like geometry, worlds like grids of friendly feeling: Doris Lessing--masterbuilder, Doris Lessing Newsletter, 1983 (7) : 13-15.
9Singleton, Mary Ann. The City and the Veld: The Fiction of Doris Lessing, Lewisburg, Pa. : Bucknell University Press, 1977.
10Roberta, Rubenstein. Briefing on inner space: Doris Lessing and R. D. Laing, Psychoanalytic Review, 1976( 1 ) : 83-93.
