Okbin Lee Yeojin Lee Seongyeol Kim Sangman Moh Ilyong Chung Application of load balancing based on symmetric balanced incomplete block design to random networks. 2564-2572 2008 178 Inf. Sci. 12 http://dx.doi.org/10.1016/j.ins.2008.02.010 db/journals/isci/isci178.html#LeeLKMC08