[1] Aбpгaн И.: O мнoжecmвax нuлъnomeнmныx элeмeнmoв u paдuкaлax npямoгo npouзвeдeнuя noлyгpynn. Mat. časop. 18 (1968), 25-33.
[3] Бocaк Ю.:
O paдuкaлax noлyгpynn. Mat.-fyz. časop. 12 (1962), 230-234.
MR 0158015
[5] Clifford A. H., Preston G. B.:
The algebraic theory of semigroups I. Amer. Math. Soc, Providence 1961.
MR 0132791
[6] Hoehnke H.-J.:
Über das untere und obere Radikal einer Halbgruppe. Math. Z. 89 (1965), 300-311.
MR 0179278 |
Zbl 0201.36102
[7] Joulain C.: Sur les anneaux non commutatifs, I. Radical, Ѕеmin. P. Dubrеil, M.-L. Dubrеil-Jacotin еt C. Piѕot, Fac. ѕci. Pariѕ 1961-1962, 15 (1963), faѕc. 2, 13/01-13/13.
[8] Koциг A.: Из кoмбuнamopuкu кoнeчныx nocлeдoвameлънocmeй. Mat.-fyz. čaѕop. 14 (1964), 75-82.
[9] Lallеmеnt C., Pеtrich M.:
Décompositions I-matricielles ďun demi-groupe. J. math. purеѕ еt appl. 45 (1966), 67-117.
MR 0197600
[10] Luh Jiang:
On thе concepts of radical of semigroup having kernel. Poгtug. math. 19 (1960), 189-198.
MR 0131482
[11] Luh Jiang:
On reflective ideals ofa ring and of a semigroup. Portug. math. 20 (1961), 119-125.
MR 0131483
[12] Munn W. D.:
Semì-groups satisfying minimal conditions. Proc. Glaѕgow Math. Aѕѕoc. 3 (1957), 145-152.
MR 0118772
[13] Numakura K.:
On bicompact semigroups with zero. Bull. Jamagata Univ. 4 (1951), 405-411.
MR 0065568
[14] Ѕchwarz Š.: K teórii pologrúp. Ѕbomík prác Prírodovеdеckеj fakulty Ѕlovеnѕkеj univеrzity v Bratiѕlavе 6 (1943), 1-64.
[15] Ѕеidеl H.:
Über das Radikal einer Halbgruppe. Mаth. Nаchr. 29 (1965), 255-263.
MR 0183800
[16] Шевpин Л. H.: К oбщeй meopuu noлyгpynn. Mат. cб. 53 (1961), 367-386.
[17] Шевpин Л. H.: Huлъnoлyгpynnы c нeкomopымu ycлoвuямu кoнeчнocmu. Mат. cб. 55 (1961), 473-480.
[18] Шевpин Л. H.:
O noлyгpynnax, вce noдnoлyгpynnы кomopыx нuлъnomeнmны. Cиб. мат. ж. 2 (1961), 936-942.
MR 0139669
[19] Шулка P.: O нuлъnomeнmныx элeмeнmax, uдeaлax u paдuкaлax noлyгpynnы. Mаt.-fуz. čаѕop. 13 (1963), 209-222.
[20] Шулка P.:
Зaмemкa o paдuкaлax в фaкmopnoлyгpynnax. Mаt.-fуz. čаѕop. 14 (1964), 297-300.
MR 0183803
[21] Шулка P.: Paдuкaлы u monoлoгuя в noлyгpynnax. Mаt.-fуz. čаѕop. 15 (1965), 3-14.
[22] Šulkа R.:
Note on the Ševrin radical in semigroups. Mаt. čаѕоp. 18 (1968), 57-58.
MR 0242978