@misc{https://doi.org/10.48550/arxiv.2011.09774,
doi = {10.48550/ARXIV.2011.09774},
url = {https://arxiv.org/abs/2011.09774},
author = {Rossi,
Giancarlo and Veneziano,
Gabriele},
keywords = {High Energy Physics - Phenomenology (hep-ph),
FOS: Physical sciences,
FOS: Physical sciences},
title = {Tetra-quarks,
penta-quarks and the like: old and new views},
publisher = {arXiv},
year = {2020},
copyright = {arXiv.org perpetual,
non-exclusive license} }