@article{MS2_1973__32_166286,
     author = {Angus Macintyre},
     title = {Martin's {Axiom} {Applied} to {Existentially} {Closed} {Groups.}},
     journal = {Mathematica Scandinavica},
     pages = {46--56},
     publisher = {mathdoc},
     volume = {32},
     year = {1973},
     zbl = {0268.02038},
     url = {http://geodesic.mathdoc.fr/item/MS2_1973__32_166286/}
}