Zhartovskyi, S., Titenko, O., Kyrychenko , O., Tyshchenko, I., Motrichuk, R. and Melnyk, V. 2021. Procedure for constructing a mathematical model to determine the time of the initial stage of fire evolution . Eastern-European Journal of Enterprise Technologies. 1, 10 (109) (Feb. 2021), 45–52. DOI:https://doi.org/10.15587/1729-4061.2021.225221.