1. Palliative medicine—a global perspective;Stjernsward,2004
2. World Health Organization. Cancer pain relief and palliative care. Technical report series 804. Geneva: World Health Organization, 1990. Available from http://www.who.int/cancer/publications/en.
3. Spain: The WHO demonstration project of palliative care implementation in Catalonia: results at 10 years (1991–2001);Gomez-Batiste;J Pain Symptom Manage,2002
4. Cancer pain relief: an urgent public health problem in India;Stjernswärd;Indian J Pain,1985
5. WHO cancer pain relief programme;Stjernswärd;Cancer Surv,1988