Zulkefly Abdul Karim et al. "The impact of ageing, population growth and fertility rate on economic growth: new evidence using dynamic heterogeneous panel." Prosiding Persidangan Kependudukan Kebangsaan 2022 (PERKKS 22): "Pemerkasaan Penduduk dan Keluarga, Teras Negara Maju"., edited by Tey, Nai Peng et al., Zes Rokman Resources, 2022, pp. 40.

Khairul Hanim Pazim, et al. "The socio-demographic factors affecting labour participation of older people in Malaysia: evidence from the fifth Malaysian population and family survey 2014 (MPFS-5)." Prosiding Persidangan Kependudukan Kebangsaan 2022 (PERKKS 22): "Pemerkasaan Penduduk dan Keluarga, Teras Negara Maju"., edited by Tey, Nai Peng et al., Zes Rokman Resources, 2022, pp. 38.

Wan Nur Baiti Sudin and Loganathan, Tharani. "The association between knowledge on sexual and reproductive health and attitude towards pornography among youth in the technical and vocational training (TVET) centres in Malaysia." Prosiding Persidangan Kependudukan Kebangsaan 2022 (PERKKS 22): "Pemerkasaan Penduduk dan Keluarga, Teras Negara Maju"., edited by Tey, Nai Peng et al., Zes Rokman Resources, 2022, pp. 430.

Sarmila Md Sum et al. "Tahap kesejahteraan penduduk warga tua: kajian kes warga tua Bandar Baru Sungai Buloh." Prosiding Persidangan Kependudukan Kebangsaan 2022 (PERKKS 22): "Pemerkasaan Penduduk dan Keluarga, Teras Negara Maju"., edited by Tey, Nai Peng et al., Zes Rokman Resources, 2022, pp. 257-267.

The 54th session of the Commission on Population and Development: general debate on population, food security, nutrition and sustainable development, New York. National Population and Family Development Board, Malaysia, 2021. 

Azian Abdul Hamid, et al. "The association between work family conflict and social demographic characteristics among fathers in Malaysia". PowerPoint presented at The 5th Asian Population Association Virtual Conference, Virtual, 3-5 August 2021. 

Zulkefly Abdul Karim et al. "The impact of aging and fertility rate on economic growth in Malaysia: new evidence using ARDL model". Prosiding Persidangan Kependudukan Kebangsaan 2021 (PERKKS), edited by Tey, Nai Peng et al., Zes Rokman Resources, 2021, pp. 43-53.

Najihah Ismail and Tey, Nai Peng. "Trends and variations in contraceptive use in Malaysia". Prosiding Persidangan Kependudukan Kebangsaan 2021 (PERKKS), edited by Tey, Nai Peng et al., Zes Rokman Resources, 2021, pp. 110.

Sanjay Rampal. "The social, health and economic impacts of Covid-19 in Malaysia". PowerPoint presented at the Webinar: The Social, Health and Economic Impacts of Covid-19 in Malaysia, Platform zoom. 27 July 2020.

R. Subramaniam, Sarada Devi. The well-being of adolescents in divorced families. 2020. University of Malaya, PhD thesis.