2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/41369We consider the spin calculations in arbitrary and diagonal spin basesLaTeX2e, 14p., Presented at the VIth International School-seminar " Actual Problems of High Energy Physics". Gomel, Belarus, August 7-16, 2001High Energy Physics - Phenomenologytext