no. 1
On Grothendieck universes
Compositio Mathematica, Tome 21 (1969) no. 1, pp. 1-3. 
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Williams, N. H. On Grothendieck universes. Compositio Mathematica, Tome 21 (1969) no. 1, pp. 1-3. http://archive.numdam.org/item/CM_1969__21_1_1_0/

P. Gabriel [1] Des catégories abéliennes. Bulletin de la Sociéte Mathématique de France, Vol. 90 (1962), pp. 324-448. | Numdam | MR | Zbl

K. Gödel [2] The consistency of the continuum hypothesis... Princeton, 1940. | MR | Zbl

A.H. Kruse [3] Grothendieck universes and the super-complete models of Shepherdson. Compositio Mathematica, Vol.17 (1965), pp. 96-101. | Numdam | MR | Zbl

J. Von Neumann, [4] Über eine Widerspruchsfreiheitsfrage in der axiomatischen Mengenlehre. Journal für die reine und angewandte Mathematik, Vol. 160 (1929), pp. 227-241. J.C. Shepherdson[5] Inner models for set theory - part II. The Journal of Symbolic Logic, Vol. 17 (1952), pp. 225-237.

A. Tarski [6] Über unerreichbare Kardinalzahlen. Fundamenta Mathematicae, Vol. 30 (1938), pp. 68 - 89. | JFM | Zbl