?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Guedj&rft.aufirst=B&rft.au=Guedj%2C+B&rft.title=Entropy&rft.issue=11&rft.atitle=Still+no+free+lunches%3A+the+price+to+pay+for+tighter+PAC-Bayes+bounds&rft.volume=23&rft.date=18+November+2021&rft.genre=article