TY - JOUR PB - American Physical Society ID - 10.1103/Physics.2.71 TI - Pushing the envelope of general relativity JF - Physics JA - Physics J1 - PHYSICS VL - 2 IS - SP - 71 EP - PY - 2009/08/24/ UR - http://link.aps.org/doi/10.1103/Physics.2.71 A1 - Nastase, Horatiu ER -