Statistical computing / William J. Kennedy and James E. Gentle

Extended cox model untuk time-independent covariate yang tidak memenuhi asumsi proportional hazard pada model cox proportional hazard = Extended cox model time for time independent covariates that violate the proportional hazard assumption in cox propotional hazard model

Statgraphics : statistical graphics system / by Statistical Graphics Corporation

Numerical methods of statistical analysis / P.S. Grewal

Computing statistics under interval and fuzzy uncertainty: applications to computer science and engineering