1. Patient's understanding of written health information;Mohammed;Nurs. Res.,1964
2. The cloze procedure;Holcomb;Health Educ.,1978
3. SMOG grading—a new readability formula;McLaughlin;J. Read.,1969
4. Fry's readability graph: Clarification, validity, and extension to level 17;Fry;J. Read.,1977