Editing Universal coefficient theorem (section)

==References==
*[[Allen Hatcher]], ''Algebraic Topology'', Cambridge University Press, Cambridge, 2002. {{ISBN|0-521-79540-0}}. A modern, geometrically flavored introduction to algebraic topology. The book is available free in PDF and PostScript formats on the [http://pi.math.cornell.edu/~hatcher/AT/ATpage.html author's homepage].
* {{cite journal
  | last = Kainen
  | first = P. C.
  | authorlink = Paul Chester Kainen
  | title = Weak Adjoint Functors
  | journal = Mathematische Zeitschrift 
  | volume = 122
  | issue = 
  | pages = 1–9
  | year = 1971
  | pmid =   
  | pmc = 
  | doi = 10.1007/bf01113560
  | s2cid = 122894881
 }}
*[[Jerome Levine]]. “Knot Modules. I.” Transactions of the American Mathematical Society 229 (1977): 1–50. https://doi.org/10.2307/1998498