@article{TAC_2018_33_a23,
     author = {Djordje Baralic and Zoran Petric and Sonja Telebakovic},
     title = {Spheres as {Frobenius} objects},
     journal = {Theory and applications of categories},
     pages = {691--726},
     publisher = {mathdoc},
     volume = {33},
     year = {2018},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TAC_2018_33_a23/}
}