APA

Guest M. A., . (1990). Morse Theory in the 1990´S. : .

Chicago

Guest Martin A, . 1990. Morse Theory in the 1990´S. : .

Harvard

Guest M. A., . (1990). Morse Theory in the 1990´S. : .

MLA

Guest Martin A, . Morse Theory in the 1990´S. : . 1990.