Online Technical Writing: Spelling Problems
- Homonyms, doubled internal consonants, internal syllables or letters, words ending in -ance and -able, words ending in -cede, -seed and -sede, the silent -e rule, doubling consonants, words ending in -ie, -ei and -y.
- http://www.io.com/~hcexres/tcm1603/acchtml/twspell.html

A Study of Some of the Most Commonly Misspelled Words
- An article by Cornell Kimball on the difficulties writers in English face in deciding the dictation of many common words in day-to-day usage. Also contains sources on 11 publications with lists of commonly misspelled words.
- http://www.barnsdle.demon.co.uk/spell/error.html

The Problem of English Spelling
- Article By Duncan MacGregor showing the anomalies in traditional English spelling and arguments for the need of spelling reform for the English language. Links.
- http://www.ncf.carleton.ca/~aa735/eng_sp.html

Variant Spellings in American English Dictionaries
- An article by Cornell Kimball showing inconsistencies in spellings of many traditional American English words in different dictionaries of the English language.
- http://www.barnsdle.demon.co.uk/spell/varsp.html