Positron and positronium physics in atomic and molecular gases: Challenges for the 21stcentury

Observation of Molecular Positronium, A Many-Positron Many-Electron System.

Atomic and Molecular Physics Using Positron Traps and Trap-Based Beams

Atomic and molecular physics using positron accumulation techniques – Summary and a look to the future

Many positron and positronium interactions

Many positron and positronium interactions*1

Experiments with Dense Low-Energy Positrons and Positronium