1. Standardfehler geschatzter Varianzkomponenten eines unbalanzie Versuchplanes in r-stufiger hierarchischer Klassifikation;Ahrens;Monatsb. Deut. Akad. Wiss. Berlin,1965
2. Comparisons of designs and estimation procedures for estimating parameters in a two-stage nested process;Anderson;Technometrics,1967
3. The examination and analysis of residuals;Anscombe;Technometrics,1963