TY - JOUR PB - American Physical Society ID - 10.1103/Physics.2.43 TI - Fluctuations in open systems JF - Physics JA - Physics J1 - PHYSICS VL - 2 IS - SP - 43 EP - PY - 2009/05/26/ UR - http://link.aps.org/doi/10.1103/Physics.2.43 A1 - Ritort, Felix ER -