@article{05644615, title = {Formal group law homomorphisms over }, journal = {The New York Journal of Mathematics [electronic only]}, volume = {15}, year = {2009}, pages = {435-450}, zbl = {1228.14040}, language = {en}, url = {http://dml.mathdoc.fr/item/05644615} }
Keating, Kevin. Formal group law homomorphisms over . The New York Journal of Mathematics [electronic only], Tome 15 (2009) pp. 435-450. http://gdmltest.u-ga.fr/item/05644615/