olemus
ISO 4:
vähim tähenduslik keeleüksus
= smallest meaningful unit of a language

ISO 5127 jm:
vähim foneemi- või grafeemijärjendiga väljendatud tähendusüksus
= smallest unit of meaning expressed by a sequence of phonemes or a sequence of graphemes

ülevaateid
http://www.unizd.hr/portals/36/kolegiji/morphology/morphology%203.pdf

https://en.wikipedia.org/wiki/Morpheme

https://en.wikipedia.org/wiki/Bound_and_free_morphemes

https://en.wikipedia.org/wiki/Content_morpheme

https://en.wikipedia.org/wiki/Allomorph

https://en.wikipedia.org/wiki/Cranberry_morpheme

http://repository.ut.ac.id/4243/1/BING4316-M1.pdf

https://studfile.net/preview/5200797/

https://www.scribd.com/document/257277798/List-of-English-Morphemes