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The notion of quadratic maps between arbitrary groups appeared at several places in the literature on quadratic algebra. Here a unified extensive treatment of their properties is given; the relation(More)
Chronic (5 weeks) exposure of freshwater-adapted European flounder, Platichthys flesus (L.), to environmental concentrations of sediment-associated tri-n-butyltin chloride (TBTCl) and triphenyltin(More)