"Robust Regression Using Iteratively Re-weighted Least-Squares."

Holland, Paul and Roy E. Welsch. Communications in Statistics, Part A Vol. 6, No. 9 (1977): 813-827.

"Stepwise Multiple Comparison Procedures."

Welsch, Roy E. Journal of the American Statistical Association Vol. 72, No. 359 (1977): 566-575.

"A Monte Carlo Study of Aggregation Effects on Regression Parameter Estimates."

Welsch, Roy E., and Edwin Kuh, Working Paper. 1977.

"Linear Regression Diagnostics."

Welsch, Roy E., and Edwin Kuh, Working Paper. 1977.

"Ridge and Robust Regression Using Parametric Linear Programming."

Welsch, Roy E., and S. Pariente, Working Paper. 1977.

"Tables for Stepwise Multiple Comparison Procedures."

Welsch, Roy E., Working Paper. 1977.