Sh:559a

Bib entry
@article{Sh:559a,
 author = {Eklof, Paul C. and Shelah, Saharon},
 title = {{New non-free Whitehead groups (corrected version)}},
 note = {\href{https://arxiv.org/abs/math/9711221}{arXiv: math/9711221} corrected version of [Sh:559]},
 arxiv_number = {math/9711221},
 refers_to_entry = {corrected version of [Sh:559]}
}