- title="{Two Formal Systems of the $\lambda\delta$ Family Revised}",
- howpublished="Preprint",
- year="2019",
- month="November",
+ title="{A Formal System for the Universal Quantification of Schematic Variables}",
+ journal="Transactions on Computational Logic",
+ volume="to appear",
+ number="",
+ pages="",
+ publisher="ACM",
+ address="New York, NY, USA",
+ year="2021",
+ month="May",