@article{10_4153_CJM_2011_035_0,
     author = {Ishii, Atsushi and Iwakiri, Masahide},
     title = {Quandle {Cocycle} {Invariants} for {Spatial} {Graphs} and {Knotted} {Handlebodies}},
     journal = {Canadian journal of mathematics},
     pages = {102--122},
     year = {2012},
     volume = {64},
     number = {1},
     doi = {10.4153/CJM-2011-035-0},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-2011-035-0/}
}