@incollection{RUDIN1977491,
    Author = {Rudin, MaryEllen},
    BookTitle = {HANDBOOK OF MATHEMATICAL LOGIC},
    Editor = {Barwise, Jon},
    ISSN = {0049-237X},
    Pages = {491 - 501},
    Publisher = {Elsevier},
    Series = {Studies in Logic and the Foundations of Mathematics},
    Title = {Martin's Axiom},
    URL = {http://www.sciencedirect.com/science/article/pii/S0049237X0871111X},
    Volume = {90},
    Year = {1977},
    bdsk-url-1 = {http://www.sciencedirect.com/science/article/pii/S0049237X0871111X},
    bdsk-url-2 = {https://doi.org/10.1016/S0049-237X(08)71111-X},
    date-added = {2018-03-07 11:16:06 +0000},
    date-modified = {2018-03-07 11:16:06 +0000},
    doi = {10.1016/S0049-237X(08)71111-X}
}

@incollection{RUDIN1977491, Author = {Rudin, MaryEllen}, BookTitle = {HANDBOOK OF MATHEMATICAL LOGIC}, Editor = {Barwise, Jon}, ISSN = {0049-237X}, Pages = {491 - 501}, Publisher = {Elsevier}, Series = {Studies in Logic and the Foundations of Mathematics}, Title = {Martin's Axiom}, URL = {http://www.sciencedirect.com/science/article/pii/S0049237X0871111X}, Volume = {90}, Year = {1977}, bdsk-url-1 = {http://www.sciencedirect.com/science/article/pii/S0049237X0871111X}, bdsk-url-2 = {https://doi.org/10.1016/S0049-237X(08)71111-X}, date-added = {2018-03-07 11:16:06 +0000}, date-modified = {2018-03-07 11:16:06 +0000}, doi = {10.1016/S0049-237X(08)71111-X} }