https://scholar.google.com/scholar_lookup?title=Study+of+Organic+Matter+of+Unconventional+Reservoirs+by+IR+Spectroscopy+and+IR+Microscopy&author=Tanykova,+N.&author=Petrova,+Y.&author=Kostina,+J.&author=Kozlova,+E.&author=Leushina,+E.&author=Spasennykh,+M.&publication_year=2021&journal=Geosciences&volume=11&pages=277&doi=10.3390/geosciences11070277