1. Algorithm 569: COLSYS: Collocation Software for Boundary-Value ODEs [D2]
2. Collocation Software for Boundary-Value ODEs
3. “British standard specification for manufacture of vertical steel welded non-refrigerated storage tanks with butt-welded shells for the petroleum industry.” (1989). BS2654-1989 British Standards Institution London U.K.
4. “Calculation formulas of strength and stability of oil tanks with floating roofs.” (1982). Mech. and Pract. Beijing China 4(2) 36–39 (in Chinese).
5. “Chinese standard specification for design of vertical steel welded storage tanks for the petroleum industry.” (1992). SH3046-92 China Petroleum and Chemistry Corporation Beijing China (in Chinese).