General theory of modular invariants
Leonard Eugene
Dickson
123-158
Beitr\"age zur Theorie der Gruppen linearer homogener Substitutionen
I.
Schur
159-175
Projective differential geometry of curved surfaces. IV
E. J.
Wilczynski
176-200
Natural families of trajectories: conservative fields of force
Edward
Kasner
201-219
Plane fields of force whose trajectories are invariant under a projective group
George Wilber
Hartwell
220-246
On the order of primitive groups
W. A.
Manning
247-258
Existence and oscillation theorem for a certain boundary value problem
George D.
Birkhoff
259-270
On the regions of convergence of power-series which represent two-dimensional harmonic functions
Maxime
Bôcher
271-278