Twist-3 light-cone distribution amplitudes of the scalar mesons within the QCD sum rules and their application to the transition form factorsHua-Yong Han, Xing-Gang Wu, Hai-Bing Fu, Qiong-Lian Zhang and Tao ZhongEur. Phys. J. A, 49 6 (2013) 78DOI: https://doi.org/10.1140/epja/i2013-13078-7