Changi Airport - Wikipedia
Full details: Changi Airport Terminal 4 reopening on 13 September - The MileLion
Gallery: New and Reopened Lounges Offer Many Options
Changi Airport Terminal 4 reopening in September - Mainly Miles
Community spotlight: App in the Air
Changi Airport T4 opening slated for second half of 2017 - News - The Jakarta Post
Singapore Airlines moving more flights to Changi Airport Terminal 2 in October - Mainly Miles
Lufthansa - News, Articles and Whitepapers - International Airport Review
Changi Airport's Terminal 4 to reopen in September this year - CNA
Asia Pacific and Oceania - News, Articles and Whitepapers - International Airport Review