no. 2
The use of injective-like structures in model theory
Compositio Mathematica, Tome 28 (1974) no. 2, pp. 113-142. 
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     year = {1974},
     mrnumber = {351801},
     zbl = {0291.02035},
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     url = {http://archive.numdam.org/item/CM_1974__28_2_113_0/}
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Simmons, H. The use of injective-like structures in model theory. Compositio Mathematica, Tome 28 (1974) no. 2, pp. 113-142. http://archive.numdam.org/item/CM_1974__28_2_113_0/

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