Shrinkable neighborhoods in Hausdorff linear spaces

Borsuk, Karol: Sur un espace compact localement contractile qui n'est pas un rétracte absolu de voisinage. Fundamenta Math.35, 175–180 (1948). Bourgin, D. G.: Linear topological spaces. Am. J. Math.65, 637–659 (1943). Dowker, C. H.: On a theorem of Hanner. Arkiv Mat.2, 307–313 (1952). Dugundji, J.: An extension of Tietze's theorem. Pacific J. Math.1, 353–367 (1951). Eidelheit, M., andS. Mazur: Eine Bemerkung über die Räume von Typus (F). Studia Math.7, 159–161 (1938). Fast, H., andS. Swierczkowski (editors): The New Scottish Book. Wroctaw 1946–1958. Hanner, Olof: Solid spaces and absolute retracts. Arkiv Mat.1, 375–382 (1951). Hanner, Olof: Retraction and extension of mappings of metric and non-metric spaces. Arkiv Mat.2, 315–360 (1952). Ives, Robert Trull: Semi-convexity and locally bounded spaces. Ph. D. Thesis, University of Washington, Seattle, Washington, U.S.A. June 1957. Kinoshita, S.: On some contractible continua without fixed-point property. Fundamenta Math.40, 96–98 (1953). Klee, Victor: Leray-Schauder theory without local convexity. Math. Ann.141, 286–296 (1960). Kuratowski, C.: Sur quelques problèmes topologiques concernant le prolongement des fonctions continues. Coll. Math.2, 186–191 (1951).