1.
Yadav J, Regmi M, Basnet P, Guddy K, Bhattarai B, Poudel P. Butorphanol in Labour Analgesia. JNMA [Internet]. 31Dec.2018 [cited 24Apr.2019];56(214):940-4. Available from: https://www.jnma.com.np/jnma/index.php/jnma/article/view/3905