Second Quantization of the Stueckelberg Relativistic Quantum Theory and   Associated Gauge Fields
  The gauge compensation fields induced by the differential operators of the Stueckelberg-Schr\"odinger equation are discussed, as well as the relation between these fields and the standard Maxwell fields. An action is constructed and the second quantization of the fields carried out using a constraint procedure. Some remarks are made on the properties of the second quantized matter fields. 
L.P. Horwitz