@article{MAN_1968__177_161709,
     author = {W. BOOTHBY},
     title = {On the {Integral} {Curves} of a {Linear} {Differential} {Form} of {Maximum} {Rank.}},
     journal = {Mathematische Annalen},
     pages = {101--104},
     publisher = {mathdoc},
     volume = {177},
     year = {1968},
     zbl = {0157.30502},
     url = {http://geodesic.mathdoc.fr/item/MAN_1968__177_161709/}
}