Grayr, A. 2021. Development of an algorithm for selecting the required frequency of injected current for multi-frequency electrical impedance tomography for tasksrelated to preoperative monitoring of human lung function. Eastern-European Journal of Enterprise Technologies. 3, 5 (111) (Jun. 2021), 25–38. DOI:https://doi.org/10.15587/1729-4061.2021.234767.