1979 | ||
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2 | Charles Landraitis: A Combinatorial Property of the Homomorphism Relation between Countable Order Types. J. Symb. Log. 44(3): 403-411 (1979) | |
1977 | ||
1 | Charles Landraitis: Definability in Well Quasi-Ordered Sets of Structures. J. Symb. Log. 42(2): 289-291 (1977) |