Critical point theory in global analysis and differential topology ; an introduction
[by] Marston Morse [and] Stewart S. Cairns.
New York : Academic Press, 1969.
xii, 389 págs. ; 24 cm.
Serie: Pure and applied mathematics; a series of monographs and textbooks ; 33
Bibliografía: p. 380-385.
Reseña: MathSciNet, 39 #6358