Ordered Groups and Infinite Permutation Groups Mathematics and Its Applications, nr. 354 Editat de W. C. Holland 30 noi 1995 Hardback Preț: 404.56 lei 6-8 săpt.
Lattice-Ordered Groups Mathematics and Its Applications, nr. 48 Editat de A. M. Glass et al. 31 mar 1989 Hardback Preț: 413.81 lei 6-8 săpt.