In volume 30, issue 6 of Petroleum Science and Technology, the incorrect text appeared in Numerical Simulation of Sensitivity to Loads and Strength of Casing Under Complicated Conditions by D. Gao et al., pages 624–633. The correct text is shown below. The publisher apologizes for any inconvenience caused.
Correct
The maximum terrestrial stress S 1 = 11:5 MPa; the minimum terrestrial stress S 2 = 11:5 n (MPa).