Editing Eigenfunction (section)

==Works cited==
{{refbegin}}
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 | date = 1989 | publisher = Wiley
 | volume = 1
 | isbn = 047150447-5
}} (Volume 2: {{isbn| 047150439-4}})
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 | others = Translated, edited, and with additions by D. ter Haar
 | publisher = Pergamon Press | location = Oxford
 | isbn = 008020438-4
}}
*{{cite book| title = Signals and systems | edition = 2nd
 | last1 = Girod | first1 = Bernd
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 | publisher = Wiley
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}}
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}}
*{{cite web| title = Eigenfunction
 | last = Wasserman | first = Eric W. | year = 2016
 | website = MathWorld
 | publisher = [[Wolfram Research]]
 | url = http://mathworld.wolfram.com/Eigenfunction.html
 | access-date = April 12, 2016
}}
{{refend}}