Random Allocation
        Guthrie, Dawn M, Pitman, Robyn, Stolee, Paul, Strong, Graham, Poss, Jeff, Tjam, Erin Y, Bowman, Lindsay, Ashworth, Melody, Hirdes, John P 2011. Reliability of standardized assessment for adults who are deafblind. Journal of rehabilitation research and development.  48 (5) 545-54.  
          Fries, B. E., Schneider, D. P., Foley, W. J., Gavazzi, M., Burke, R., Cornelius, E. 1994. Refining a case-mix measure for nursing homes: Resource Utilization Groups (RUG-III). Medical Care.  32 (7) 668-85.