[2] J. Horváth:
Topological Vector Spaces and Distributions. Vol. 1, Addison-Wesley 1966.
MR 0205028
[4] L. Hörmander:
Linear Partial Differential Operators. Springer 1963.
MR 0404822
[5] J. Kučera:
Fourier $L_2$-transform of Distributions. Czech. Math. J., Vol. 19 (94), Praha 1969, pp. 143-53.
MR 0240616