@techreport{KotsireasKoutschan21,
 author = {Ilias Kotsireas and Christoph Koutschan},
 title = {Legendre pairs of lengths $\ell \equiv 0$ (mod 3)},
 institution = {RICAM Reports Series},
 year = {2021},
 number = {2021-01},
 note = {Submitted for publication (preprint on arXiv:2101.03116)},
}