Low-pT quarkonium polarization measurements: Challenges and opportunities
P. Faccioli, I. Krätschmer, C. Lourenço, Physics Letters B 840 (2023).

Universal physics of bound states of a few charged particles
C.H. Schmickler, H.-W. Hammer, A. Volosniev, Physics Letters B 798 (2019).

Geometric construction of new Yang-Mills instantons over Taub-NUT space
G. Etesi, T. Hausel, Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 514 (2001) 189–199.