+ note="CoRR identifier 1911.12749",
+}
+
+@misc{lambdadeltaV2b,
+ author="Ferruccio {Guidi}",
+ title="{lambdadelta\_2B}",
+ howpublished="Formal specification for the interactive prover Matita 0.99.4",
+ year="2019",
+ month="November",
+ note="Available at $\lambda\delta$ Web site: $<$\url{http://lambdadelta.info/}$>$"