. "3"^^ . . "nil-semigroup, commutative nil-semigroup"@en . "1"^^ . "Komutativn\u00ED nil-pologrupy indexu 2 bez ireducibiln\u00EDch prvk\u016F"@cs . . "Every commutative nil-semigroup of index 2 can be imbedded into such a semigroup without irreducible elements."@cs . . "0862-7959" . . "RIV/60460709:41310/08:24970!RIV09-GA0-41310___" . "Komutativn\u00ED nil-pologrupy indexu 2 bez ireducibiln\u00EDch prvk\u016F"@cs . "Kepka, Tom\u00E1\u0161" . . "Commutative semigroups that are nil of index 2 and have no irreducible elements"@en . "1" . "Je\u017Eek, Jaroslav" . "7"^^ . "Commutative semigroups that are nil of index 2 and have no irreducible elements"@en . . . . . . "RIV/60460709:41310/08:24970" . "N\u011Bmec, Petr" . . . "41310" . . . "P(GA201/05/0002), Z(MSM0021620839)" . "Commutative semigroups that are nil of index 2 and have no irreducible elements" . "Commutative semigroups that are nil of index 2 and have no irreducible elements" . "Every commutative nil-semigroup of index 2 can be imbedded into such a semigroup without irreducible elements." . "133" . "CZ - \u010Cesk\u00E1 republika" . . "[F13C2C71F659]" . "360479" . "Mathematica Bohemica" . "Every commutative nil-semigroup of index 2 can be imbedded into such a semigroup without irreducible elements."@en .