Ostrow, CL. (maig 1997). «Use of the Trendelenburg position by critical care nurses: Trendelenburg survey» American Journal of Critical Care 6 (3): 172–6. doi:10.4037/ajcc1997.6.3.172. PMID9131195..
Ostrow, CL. (maig 1997). «Use of the Trendelenburg position by critical care nurses: Trendelenburg survey» American Journal of Critical Care 6 (3): 172–6. doi:10.4037/ajcc1997.6.3.172. PMID9131195..