1. Ballardini RM, Norrgård M, Bruun N (2015) Transitions in European patent law. Influences of the unitary patent package. Kluwer Law Int. ISBN 978-90-411-5605-1. http://www.wklawbusiness.com/store/products/transitions-european-patent-law-influences-unitary-patent-package-prod-9041156054/hardcover-item-1-9041156054
2. Ballardini RM, Kaisto J, Similä J (2021) Developing novel property concepts in private law to foster the circular economy. J Clean Prod 279:123747
3. Ballardini RM (2012) Intellectual property protection of computer programs. Developments, challenges, and pressures for change, Economics and Society – 246. Doctoral thesis, Hanken School of Economics, Helsinki, Finland. https://helda.helsinki.fi/handle/10138/35504
4. Burk DL, Lemley MA (2002) Is patent law technology-specific? Berkeley Technol Law J 17:1155. Minnesota Public Law Research Paper No. 02-14, UC Berkeley Public Law Research Paper No. 106, Available at SSRN: https://ssrn.com/abstract=349761;. https://doi.org/10.2139/ssrn.349761
5. Callens P, Granata S (2017) Unitary patent protection unified patent court, 2nd edn. Wolters Kluwer