In the original paper, Eq. (9) (p. 041701-3) and the expression for parameters λ (p. 041701-4, after Eq. (32)) and ρ (p. 041701-5, after Eq. (40)) are not correct.

$Qx=∂Mx∂x=−2M0g2(ξ)le+Q0g4(ξ)$
$λ=νE(1t1−1t2)2Dk2le22$
$ρ=(1−2β)δ+βωle1$