I want to use the 3 simulation models presented in the examples sections by this website for a small calculation for the evaluation of urea generation for publishing the research paper in international journal. Can I use simulation made by others that is made to be accessed by anyone in this website for just simple analysis. My plan is to do techno-economic assessment of urea generation in my country and I want to use 3 examples simulation fro this website for determination of urea production capacity. Will there be any restriction or is it unethical? Please describe me how can I use the simulations. I wont present the flowsheet in research paper just show the results obtained.