@article{PMIHES_1968__35__71_0,
     author = {Nicholas M. Katz},
     title = {On the differential equations satisfied by period matrices},
     journal = {Publications Math\'ematiques de l'IH\'ES},
     pages = {71--106},
     year = {1968},
     publisher = {Institut des Hautes \'Etudes Scientifiques},
     volume = {35},
     doi = {10.1007/BF02698924},
     mrnumber = {39 #4168},
     zbl = {0159.22502},
     language = {en},
     url = {https://pmihes.centre-mersenne.org/articles/10.1007/BF02698924/}
}