Colman, Fran . 1991. What positions fit in?. In: Kastovsky, Dieter . Historical English syntax. 51-102. Berlin: Mouton de Gruyter.

Anderson, John M. 2000. 'What became of Waring?' Questioning the predicator in English. Studia Anglica Posnaniensia 35, 53-80.

Anderson, John M. 2013. What are 'grammatical periphrases'?. In: Hegedus, Irén  & Dóra  Podör. Periphrasis, replacement and renewal: Studies in English Historical Linguistics. 14-33. Newcastle-upon-Tyne: Cambridge Scholars.

Anderson, John M. 1973. A wee note on interludes and truncation in French. Edinburgh Working Papers in Linguistics 2, 90-92.