“…This idea was proposed by Gell-Mann (1953). By the time of the review articles by Dalitz (1957) and Gell-Mann & Rosenfeld (1957), the classification scheme for the spin-parity-1/2+ hyperons (the A, an I-spin singlet with S = -1, the L+,LO,L-, an I-spin triplet also with S= -1, and the 3°,3-I-spin doublet with S = -2) was established in notation still currently used.…”