TY - JOUR PB - American Physical Society ID - 10.1103/Physics.4.34 TI - Proper carbon ID required JF - Physics JA - Physics J1 - PHYSICS VL - 4 IS - SP - 34 EP - PY - 2011/04/25/ UR - http://link.aps.org/doi/10.1103/Physics.4.34 A1 - Altman, Eric I. ER -