2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/47583A method is presented for obtaining the $ε$-expansion for on-shell massless scalar double-box diagram.5p PS (Gsview 2.0); Talk at XII QFTHEP workshop (September 1997, Samara, Russia), to be published in proceedings (Inst. Nucl. Physics of MSU, Moscow)High Energy Physics - Phenomenologytext