Vaismoradi, M., Sarhangi, F., Azarmnejad, E., Javadi, M., Tadrisi, S. D., & Rejeh, N. (2021). The effect of the mother's heartbeat sound on physiological parameters and pain intensity after blood sampling in neonates in the intensive care unit: A randomized controlled clinical trial. Journal of Neonatal Nursing, 27(2), pp. 123-128. doi:10.1016/j.jnn.2020.07.006

Vaismoradi, Mojtaba, Forogh Sarhangi, Elham Azarmnejad, Mahrooz Javadi, Seyed Davood Tadrisi, and Nahid Rejeh. "The Effect of the Mother's Heartbeat Sound On Physiological Parameters and Pain Intensity After Blood Sampling in Neonates in the Intensive Care Unit: A Randomized Controlled Clinical Trial." Journal of Neonatal Nursing 27, no. 2 (2021): 123-128.

Vaismoradi, Mojtaba, et al. "The Effect of the Mother's Heartbeat Sound On Physiological Parameters and Pain Intensity After Blood Sampling in Neonates in the Intensive Care Unit: A Randomized Controlled Clinical Trial." Journal of Neonatal Nursing 27.2 (2021): 123-128.