Intrinsic bounds on complexity and definability at limit levels. - John Chisholm; Ekaterina B. Fokina; Sergei S. Goncharov; Valentina S. Harizanov; Julia F. Knight; Sara Quinn (J. Symb. Log., 2009)

Classes of Ulm type and coding rank-homogeneous trees in other structures. - Ekaterina B. Fokina; Julia F. Knight; Alexander G. Melnikov; Sara Quinn; C. Safranski (J. Symb. Log., 2011)