Materials of previous "Mathematical Modeling and Simulation of Systems" conferences are able in the links:
Mathematical Modeling and Simulation of Systems 2024. Selected Papers
Mathematical Modeling and Simulation of Systems 2023. Selected Papers
Mathematical Modeling and Simulation of Systems 2022. Selected Papers
Mathematical Modeling and Simulation of Systems 2021. Selected Papers
Mathematical Modeling and Simulation of Systems 2020. Selected Papers
Mathematical Modeling and Simulation of Systems 2019. Selected Papers