Parallel and distributed processing : 11th IPPS/SPDP '99 workshops held in conjunction with the 13th International Parallel Processing Symposium and 10th Symposium on Parallel and Distributed Processing, San Juan, Puerto Rico, USA, April 12-16, 1999 : proceedings - International Parallel Processing Symposium; IEEE Symposium on Parallel and Distributed Processing; Rolim, José D. P. (Springer Verlag, 1999)