Efficient Stable Sorting with Minimal Extra Space - Edward C. Horvath (STOC, 1974)

A Level Algorithm for Preemptive Scheduling. - Edward C. Horvath; Shui Lam; Ravi Sethi (J. ACM, 1977)

Stable Sorting in Asymptotically Optimal Time and Extra Space. - Edward C. Horvath (J. ACM, 1978)