Systems theory and systems analysis in economics: Tutorial /A.V.Tyurin, A.Yu. Akhmerov - Düsseldorf: 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 students' knowledge of the laws and models of systems, methods of analysis and synthesis of systems; developing the ability to apply the laws, models and methods of systems; problem-solving skills by system analysis methods.