Taylor, B., & Davis, S. (2006). Using the extended PLISSIT model to address sexual healthcare needs. Nursing Standard, 21(11), 35-40.
For some interesting reading on bisexual and lesbian viewpoints about STI prevention, see:
Marrazzo, J.M., Coffey , P. & Bingham, A. (2005). Sexual practices, risk perception and knowledge of sexually transmitted disease risk among lesbian and bisexual women. Perspectives on Sexual and Reproductive Health, 37(1), 6-12.