[MIDAS로 배우는 구조역학] 3장 아치 해석 Arch
• YouTube: 
https://www.youtube.com/watch?v=naBhpiCbcaA&list=PLXMmPDu5-PnfaY2KqGNHYeIbZ4AMntpO1&index=3
• PDF: 
https://www.dropbox.com/s/dumvwwr6wu59ayt/04_03%20Arch.pdf?dl=0