TY - SER AU - Nedelchev,A. AU - Stratiev,D. AU - Stoilov,G. AU - Dinkov,R. AU - Lepidis,K. AU - Sharpe,R. AU - Russell,C.A. AU - Petkova,N. AU - Petkov,P. TI - Visbreaker performance improvement by optimisation of process conditions and application of chemical additive treatment program PY - 2013/// CY - PB - ER -