(1) In [1, equation (15), page 6], 𝑝π‘₯,𝑝𝑦=𝐿(𝑒,𝑣)(1) should be replaced by 𝑝π‘₯,𝑝𝑦=1𝐿(𝑒,𝑣).(2) (2) In [1, equation (16), page 6], (𝑒,𝑣)new=πœ‡π‘π‘§πΏ((𝑒,𝑣)β€–β€–β€–β€–)(𝑒,𝑣)old(3) should be replaced by (𝑒,𝑣)new=πœ‡π‘π‘§πΏ((𝑒,𝑣)β€–β€–β€–β€–)(𝑒,𝑣)old.(4)