1. Ballester , J. M. , Dopazo , C. , Elola , S. , Garcia , J. I. , Lagranja J. I., Lagranja, J. LVidal,P. J. ( 1988 ). Improvement of the Atomization and Combustion in Oil-Fired Power Plant Boilers using Pressure-Swirl Nozzles . Vol I Atomization Tests (In Spanish). Contract P.I.E. No. HE-56/13131, Zaragoza .
2. Ballester , J. M. ( 1992 ). Experimental Study of Atomization and Combustion of Heavy Fuel Oil ( In Spanish). Ph.D Thesis , University of Zaragoza .