Dr. Seema, Dr. Kamna Tiwari, Dr. Ajay Pal Singh, and Dr.Sanjay Rawat, “‘’STUDY THE ECG FINDINGS, ECHO FINDINGS AND HOLTER MONITORING FINDINGS IN COPD PATIENT’’”, J Popl Ther Clin Pharmacol, vol. 30, no. 7, pp. 517–528, Jul. 2023, doi: 10.53555/jptcp.v30i7.2615.