นิธิกาญจนธาร จ. (2018) “The Time Delay Control of the Technique PERT/CPM TOT Public Company Limited Case Study: The Project to Install Speed Fiber to the x (FTTx) at the NGV Stations PTT Pathum Thani”, Srinakharinwirot University Engineering Journal. Bangkok, Thailand, 13(1), pp. 13–26. available at: https://ph02.tci-thaijo.org/index.php/sej/article/view/140208 (accessed: 6 December 2025).