@article{CM_1939__6__296_0,
     author = {Wolff, Julius},
     title = {L{\textquoteright}\'equation diff\'erentielle $\frac{dz}{dt} = w(z) =$ fonction holomorphe \`a partie r\'eelle positive dans un demi-plan},
     journal = {Compositio Mathematica},
     pages = {296--304},
     publisher = {Johnson Reprint Corporation},
     volume = {6},
     year = {1939},
     zbl = {0019.42003},
     language = {fr},
     url = {http://www.numdam.org/item/CM_1939__6__296_0/}
}