Sh:505

Bib entry
@incollection{Sh:505,
 author = {Eklof, Paul C. and Shelah, Saharon},
 title = {{A combinatorial principle equivalent to the existence of non-free Whitehead groups}},
 booktitle = {{Abelian group theory and related topics (Oberwolfach, 1993)}},
 series = {Contemp. Math.},
 volume = {171},
 year = {1994},
 pages = {79--98},
 doi = {10.1090/conm/171/01765},
 mrclass = {20K20 (03E05)},
 mrnumber = {1293134},
 mrreviewer = {L. Bican},
 doi = {10.1090/conm/171/01765},
 publisher = {Amer. Math. Soc., Providence, RI},
 note = {\href{https://arxiv.org/abs/math/9403220}{arXiv: math/9403220}},
 arxiv_number = {math/9403220}
}