@article{NSJOM_2006_36_2a_1,
     author = {H. Li and X. Liu},
     title = {On spin $Z_6$-actions on spin 4-manifolds},
     journal = {Novi Sad Journal of Mathematics},
     pages = {13-23},
     publisher = {mathdoc},
     volume = {36},
     number = {2},
     year = {2006},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_2006_36_2a_1/}
}