@misc{miscd548a805,
title   = {QCD sum rules approach to the X, Y and Z states},
author = {Albuquerque, Raphael M. and Dias, Jorgivan M. and Khemchandani, K. P. and Zanetti, Carina M. and Martinez Torres, Alberto and Navarra, Fernando Silveira and Nielsen, Marina},
year = {2020}
}