1. N. Garg, M. Singh, O. Sharma and V. Mohanan, Current status of acoustic measurement standards at National Physical Laboratory of India (NPLI). New Delhi, Part 1: Sound Pressure, MAPAN-J. Metrol. Soc India, 22 (2007) 77–90.
2. N. Garg and O. Sharma, Measurement accuracy of secondary standards of sound pressure in comparison to primary standards, MAPAN-J. Metrol. Soc India, 27 (2012) 219–229.
3. N. Garg, A. Kumar, M.A. Sanjid, K.P. Chaudhary and S. Maji, Reaffirmation of measurement uncertainty in pressure sensitivity determination of LS2P microphones by reciprocity method, Measurement, 51 (2014) 281–288.
4. N. Garg, Establishing a traceability chain for sound pressure and vibration amplitude measurements, NCSLI Meas. J. Meas. Sci. 10 (2015) 68–78.
5. IEC 61094-1, IEC standard: measurement microphones—Part 1: specifications for laboratory standard microphones, International Electrotechnical Commission, Geneva (2000).