RU 2784816. Ivanova K.M., Grishko V.V., Ivshina I.B. Method of biodegradation of dehydroabietic acid. Effective date for property rights: 22.02.2022. Date of filing: 22.02.2022. Registered with the Public Register for Inventions 29.11.2022. Date of publication: 29.11.2022. Bull. 34.