@article{Rossi_2021,
title={Tetra-quarks,
penta-quarks and the like: old and new views},
volume={312–317},
ISSN={2405-6014},
url={http://dx.doi.org/10.1016/j.nuclphysbps.2021.05.036},
DOI={10.1016/j.nuclphysbps.2021.05.036},
journal={Nuclear and Particle Physics Proceedings},
publisher={Elsevier BV},
author={Rossi,
G.C. and Veneziano,
G.},
year={2021},
month=jul,
pages={140–145} }