1. J.F.Besseling, ?Investigation of Transient Creep in Thick-walled Tubes under Axially Symmetric Loading?, IUTAM Colloquium on Creep in Structures, Stanford 1960, Proceedings, Springer, Berlin 1962, 174?194.
2. J.Hult, ?Primary Creep in Thickwalled Spherical Shells?, Trans. Chalmers Univ. of Technol. No. 264, Gothenburg 1963, 26 pp.
3. G.Rosengren, ?Primary Creep in Cylindrical Pressure Vessels?, Archiwum Mechaniki Stosowanej, 4, 16.(1964), 959?972.
4. F.K.G.Odqvist and J.Hult, ?Kriechfestigkeit metallischer Werkstoffe?, Springer, Berlin 1962, 303 pp.
5. T.Kato, ?Nonlinear Evolution Equations in Banach Spaces?, Proceedings of Symposia in Applied Mathematics, Volume XVII, American Mathematical Society, Providence, Rhode Island, 1965, 50?67.