A corpus-linguistic analysis of English -ic vs -ical adjectives.
Testing the sub-test: A collocational-overlap analysis of English -ic and -ical adjectives.
Electric/electrical and classic/classical: Variation between the suffixes -ic and -ical.
Nobility in the history of adjectives ending in -ic and -ical.
Fowler's suggestion that, for those pairs of -ic and -ical
suffixes where there is no apparent difference of meaning, -ic forms are favored in American English and -ical
ones in British English, is one with which I cannot agree.