Briscese, F., Calcagni, G., Modesto, L., & Nardelli, G. Form factors, spectral and Källén-Lehmann representation in nonlocal quantum gravity. SpringerOpen.
Chicago Style (17th ed.) CitationBriscese, Fabio, Gianluca Calcagni, Leonardo Modesto, and Giuseppe Nardelli. Form Factors, Spectral and Källén-Lehmann Representation in Nonlocal Quantum Gravity. SpringerOpen.
MLA (9th ed.) CitationBriscese, Fabio, et al. Form Factors, Spectral and Källén-Lehmann Representation in Nonlocal Quantum Gravity. SpringerOpen.
Warning: These citations may not always be 100% accurate.