Systems theory and systems analysis in economics: Tutorial /A.V.Tyurin, A.Yu. Akhmerov ‒ D sseldorf: LAP LAMBERT Academic Publishing GmbH & Co.KG., 2020. - 164 p. - ISBN 978-620-2-55443-5 .The manual is written in accordance with the syllabus of the course "Theory of Systems and Systems Analysis", which is read by masters in the specialty "Economics". The basics of systems theory and systems analysis are presented with the purpose of mastering...