[2] S. Izumi G. Sunouchi:
Abstract integrals and linear operators. Proc. Imp. Ac. Tokyo 19 (1943) 169-173.
MR 0014585
[3] V. Pták:
On complete topological linear spaces. Czech. Math. J. 78 (1953), 301-364.
MR 0064303
[5] V. Pták:
On the closed graph theorem. Czech. Math. J. 84 (1959), 523 - 527.
MR 0115061
[6] A. Robertson W. Robertson:
On the closed graph theorem. Proc. Glasgow Math. Ass. 3 (1956) 9-12.
MR 0084108
[7] A. Robertson W. Robertson: Topological vector Spaces. Cambridge Tracts, 1962.