Les bols des fonctions non-dégénérées d'une variété différentielle Marston Morse Séminaire Jean Leray
A positive, lower semi-continuous, non-degenerate function on a metric space Marston Morse — 1948 Fundamenta Mathematicae
The existence of pseudoconjugates on Riemann surface Marston Morse; J. Jenkins — 1952 Fundamenta Mathematicae
The existence of vector function spaces with duals of integral type Marston Morse; W. Transue — 1958 Colloquium Mathematicae