@article{CM_1993__85_1_109_0,
     author = {Nart, Enric},
     title = {Formal group laws for certain formal groups arising from modular curves},
     journal = {Compositio Mathematica},
     pages = {109--119},
     publisher = {Kluwer Academic Publishers},
     volume = {85},
     number = {1},
     year = {1993},
     mrnumber = {1199207},
     zbl = {0824.14039},
     language = {en},
     url = {http://archive.numdam.org/item/CM_1993__85_1_109_0/}
}