Hypersets

This publication has 2 references indexed in Scilit:

• David Harel. Dynamic logic. Handbook of philosophical logic, Volume II, Extensions of classical logic, edited by D. Gabbay and F. Guenthner, Synthese library, vol. 165, D. Reidel Publishing Company, Dordrecht, Boston, and Lancaster, 1984., pp. 497–604.
  The Journal of Symbolic Logic, 1989
• Admissible Sets and Structures
  Published by Springer Nature ,1975