- Nonlinearly Perturbed Semi-Markov Processes
- Perturbed Semi-Markov Type Processes I: Limit Theorems for Rare-Event Times and Processes
- Perturbed Semi-Markov Type Processes II: Ergodic Theorems for Multi-Alternating Regenerative Processes
- Perturbed Semi-Markov Type Processes I: Limit Theorems for Rare-Event Times and Processes
- Coupling and Ergodic Theorems for Semi-Markov-Type Processes I: Markov Chains, Renewal, and Regenerative Processes