@techreport{AGIMPP2014,
title = {Complexity of Model Checking for Reaction Systems},
author = {Azimi, Sepinoud and Gratie, Cristian and Ivanov, Sergiu and Manzoni, Luca and Petre, Ion and Porreca, Antonio E.},
number = {1122},
series = {TUCS Technical Reports},
publisher = {TUCS},
year = {2014},
}

@techreport{AGIP2014,
title = {Dependency Graphs and Mass Conservation in Reaction Systems},
author = {Azimi, Sepinoud and Gratie, Cristian and Ivanov, Sergiu and Petre, Ion},
number = {1123},
series = {TUCS Technical Reports},
publisher = {TUCS},
year = {2014},
keywords = {Reaction system; model checking; mass conservation; conserved set; conservation dependency graph; simulator},
ISBN = {978-952-12-3123-0},
}

@article{IvanovMarcus2015,
  Title   = {On the Lower Bounds for Leftist Insertion-Deletion Languages},
  Author  = {Sergiu Ivanov and Sergey Verlan},
  Journal = {Annals of the University of Bucharest (Informatics)},
  Volume  = {LXII(2)},
  Pages   = {77--88},
  Year    = {2015}
}