Bibliografia

Principal

• J. Rotman (1991) An Introduction to Algebraic Topology J. Rotman, An Introduction to Algebraic Topology, Springer Graduate Texts in Mathematics (1991)
• J. Milnor (1963) Morse Theory J. Milnor, Morse Theory, Princeton University Press (1963)
• I. Madsen and J. Tornehave (1997) From Calculus to Cohomology I. Madsen & J. Tornehave, From Calculus to Cohomology, Cambridge U. P (1997)

Secundária

• R. Bott and L. Tu (1982) Differential Forms in Algebraic Topology R. Bott & L. Tu, Differential Forms in Algebraic Topology, Springer GTM 82, (1982)