J. Lauwers, A. Verbeure, V. A. Zagrebnov
Bose-Einstein Condensation for a Class of Homogeneous Interacting Systems
(366K, PostScript)

ABSTRACT.  We prove rigorously the occurrence of zero-mode Bose-Einstein condensation for 
real continuous homogeneous systems of boson particles with superstable
interactions and with a gap in the one-particle excitations spectrum. 
The idea of proof consists of comparing the system with a specially tuned
soluble model.