D. Cangemi et R. Jackiw, QUANTAL ANALYSIS OF STRING-INSPIRED LINEAL GRAVITY WITH MATTER FIELDS, Physics letters. Section B, 337(3-4), 1994, pp. 271-278
We show that string-inspired lineal gravity interacting with matter fi
elds cannot be Dirac-quantized owing to the well-known anomaly in ener
gy-momentum tensor commutators.