1. Hoskins, R.F., Sousa Pinto, J.: Theories of Generalized Functions: Distributions, Ultradistributions and Other Generalized Functions, 2nd edn. Woodhead Publ, Philadelphia (2011)
2. Björck, G.: Linear partial differential operators and generalized distributions. Ark. Mat. 6, 351–407 (1966)
3. Roumieu, C.: Sur quelques extensions de la notion de distribution. Ann. Sci. École Norm. Sup. Sér. 3(77), 41–121 (1960)
4. Pilipović, S.: Beurling-Gevrey tempered ultradistributions as boundary values. Portugaliae Math. 48, 483–504 (1991)
5. Komatsu, H.: Ultradistributions I. Structure theorems and a characterization. J. Fac. Sci. Univ. Tokyo Sect. IA Math. 20, 25–105 (1973)