@article{PMIHES_1968__35__71_0,
     author = {Katz, Nicholas M.},
     title = {On the differential equations satisfied by period matrices},
     journal = {Publications Math\'ematiques de l'IH\'ES},
     pages = {71--106},
     publisher = {Institut des Hautes \'Etudes Scientifiques},
     volume = {35},
     year = {1968},
     mrnumber = {39 #4168},
     zbl = {0159.22502},
     language = {en},
     url = {http://archive.numdam.org/item/PMIHES_1968__35__71_0/}
}