<A HREF="http://arxiv.org/abs/math-ph/0604003">Few-Body Systems **38**, 125 (2006):</A> *On critical stability of three quantum charges interacting through delta potentials*, H.D. Cornean, P. Duclos, B. Ricaud.

> We consider three one dimensional
> quantum, charged and spinless
> particles interacting through delta
> potentials. We derive sufficient
> conditions which guarantee the
> existence of at least one bound state.