@article{10_4153_CJM_2015_024_7,
     author = {Demchenko, Oleg and Gurevich, Alexander},
     title = {Kernels in the {Category} of {Formal} {Group} {Laws}},
     journal = {Canadian journal of mathematics},
     pages = {334--360},
     year = {2016},
     volume = {68},
     number = {2},
     doi = {10.4153/CJM-2015-024-7},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-2015-024-7/}
}