@article{CTT100830294,
  author = {Lei Shi and Ivan Romić and Yongjuan Ma and Zhen Wang and Boris Podobnik and Harry Eugene Stanley and Petter Holme and Marko Jusup},
  title = {Freedom of choice adds value to public goods},
  journal = {Proceedings of the National Academy of Sciences of the United States of America, Proc. Natl. Acad. Sci. U. S. A, PNAS, PRONAS},
  year = 2020,
}