@article{10_4153_S0008439521000837,
     author = {Ceniceros, Jose and Churchill, Indu R. and Elhamdadi, Mohamed},
     title = {Singquandle shadows and singular knot invariants},
     journal = {Canadian mathematical bulletin},
     pages = {770--787},
     year = {2022},
     volume = {65},
     number = {3},
     doi = {10.4153/S0008439521000837},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/S0008439521000837/}
}