@article{PismaZhETF.109.292,
    title = {A note on reflection positivity in nonlocal gravity},
    author = {Christodoulou, M. and Modesto, L.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {109},
    issue = {5},
    pages = {292},
    year = {2019},
    doi = {10.1134/S0370274X19050023},
    url = {http://jetpletters.ru/ps/dx/10.1134/S0370274X19050023},
}