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ACTA issues
87:3-4(2021)
87:1-2(2021)
86:3-4(2020)
86:1-2(2020)
85:3-4(2019)
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84:3-4(2018)
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81:3-4(2015)
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80:3-4(2014)
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79:3-4(2013)
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78:3-4(2012)
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77:3-4(2011)
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76:3-4(2010)
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75:3-4(2009)
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74:3-4(2008)
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69:3-4(2003)
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68:3-4(2002)
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67:3-4(2001)
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66:3-4(2000)
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65:3-4(1999)
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64:3-4(1998)
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63:3-4(1997)
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62:3-4(1997)
62:1-2(1996)
61:1-4(1995)
60:3-4(1995)
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59:3-4(1994)
59:1-2(1994)
58:1-4(1993)
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56:3-4(1992)
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55:3-4(1991)
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54:3-4(1990)
54:1-2(1990)
53:3-4(1989)
53:1-2(1989)
52:3-4(1988)
52:1-2(1988)
51:3-4(1987)
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49:1-4(1985)
48:1-4(1985)
47:3-4(1984)
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45:1-4(1983)
44:3-4(1982)
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33:1-2(1972)
32:3-4(1971)
32:1-2(1971)
31:3-4(1970)
31:1-2(1970)
30:3-4(1969)
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21:3-4(1960)
21:1-2(1960)
20:4-4(1959)
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19:3-4(1958)
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17:3-4(1956)
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15:3-4(1953-54)
15:2-2(1953-54)
15:1-1(1953-54)
14:4-4(1951-52)
14:3-3(1951-52)
14:2-2(1951-52)
14:1-1(1951-52)
13:3-4(1949-50)
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13:1-1(1949-50)
12:B-B(1950)
12:A-A(1950)
11:4-4(1946-48)
11:3-3(1946-48)
11:1-2(1946-48)
10:3-4(1941-43)
10:2-2(1941-43)
10:1-1(1941-43)
9:4-4(1938-40)
9:3-3(1938-40)
9:2-2(1938-40)
9:1-1(1938-40)
8:4-4(1936-37)
8:2-3(1936-37)
8:1-1(1936-37)
7:4-4(1934-35)
7:3-3(1934-35)
7:2-2(1934-35)
7:1-1(1934-35)
6:4-4(1932-34)
6:2-3(1932-34)
6:1-1(1932-34)
5:3-4(1930-32)
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5:1-1(1930-32)
4:4-4(1928-29)
4:3-3(1928-29)
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3:4-4(1927)
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2:4-4(1924-26)
2:3-3(1924-26)
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2:1-1(1924-26)
1:4-4(1922-23)
1:3-3(1922-23)
1:2-2(1922-23)
1:1-1(1922-23)
On axiomatic characterization of $\sum$-semirings
S.-M. Lee
Acta Sci. Math. (Szeged)
32:3-4(1971), 337-343
4437/2009