1. English intensifiers and their idiosyncrasies;Allerton,1987
2. Hrvatska gramatika [Croatian Grammar];Barić,1997
3. The intensifying function of modal particles and modal elements in a cross-linguistic perspective;Batinić;Rasprave,2015
4. L’analyse des données. 2. L'analyse des correspondances [Data Analysis. 2. Correspondence Analysis];Benzécri,1973
5. Longman Grammar of Spoken and Written English;Biber,1999