@article{article0bcc34cd,
title   = {QCD sum rules approach to the X, Y and Z states},
author = {Albuquerque, Raphael M and Dias, Jorgivan Morais and Khemchandani, K P and Martinez Torres, Alberto and Navarra, Fernando Silveira and Nielsen, Marina and Zanetti, Carina M},
year = {2019},
doi = {10.1088/1361-6471/ab2678},
journal   = {Journal of Physics G: Nuclear and Particle Physics}
}