Alur, Rajeev, Limor Fix, and Thomas A Henzinger. “A Determinizable Class of Timed Automata.”https://doi.org/10.1007/3-540-58179-0_39__In International Conference on Computer Aided Verification, 818:1–13. Springer, 1994.https://doi.org/10.1007/3-540-58179-0_39 .

Alur, Rajeev, Costas Courcoubetis, Thomas A Henzinger, Pei Ho, Xavier Nicollin, Alfredo Olivero, Joseph Sifakis, and Sergio Yovine. “The Algorithmic Analysis of Hybrid Systems.”https://doi.org/10.1007/BFb0033565__In 11th International Conference on Analysis and Optimization of Systems Discrete Event Systems, 199:331–51. Springer, 1994.https://doi.org/10.1007/BFb0033565 .

Zarkower, David, Mario de Bono, Rachel Aronoff, and Jonathan Hodgkin. “Regulatory Rearrangements and Smg-Sensitive Allels of the C. Elegans Sex-Determining Gene Tra-1.”https://doi.org/10.1002/dvg.1020150306__Developmental Genetics. Wiley, 1994.https://doi.org/10.1002/dvg.1020150306 .