[K] J. L. KELLEY:
General Topology. Van Nostrand, New York 1957.
MR 0070144
[M1] J. MLČEK:
Approximations of $\pi $-classes and $\sigma $-classes. CMUC 20 (1979), 669-680.
MR 0555182
[M2] J. MLČEK:
Valuations of structures. CMUC 20 (1979), 681-696.
MR 0555183
[S-V1] A. SOCHOR P. VOPĚNKA:
Endomorphic universes and their standard extensions. CMUC 20 (1979), 605-630.
MR 0555178
[V] P. VOPĚNKA:
Mathematics in the Alternative Set Theory. Teubner, Leipzig 1979; Russian translation, Mir, Moskva 1983.
MR 0718490
[V1] P. VOPĚNKA:
The lattice of indiscernibility equivalences. CMUC 20 (1979), 631-638.
MR 0555179