| Citation | Verified | Memento | |
|---|---|---|---|
| 📖 | https://alabamareflector.com/2024/01/25/kenneth-eugene-smith-executed-by-nitrogen-gas-for-1988-murder-for-hire-scheme/ | 2025.11.06 | |
| 📖 | https://www.cnn.com/audio/podcasts/5-things/episodes/146b819c-8f0111eea87667c76723c206 | 2025.11.06 | |
| 📖 | https://apnews.com/article/alabama-execution-nitrogen-abbee4a788ad61f5b8d7cfe0d7afe992 | 2025.11.06 |