Pereira, W.P.D. and Kathirgamanathan, P., 1977. An infinite optical path photoreactor and a filter for the isolation of light at 366 nm. Journal of the National Science Foundation of Sri Lanka, 5(1), pp.41–58.

Pereira WPD, Kathirgamanathan P. An infinite optical path photoreactor and a filter for the isolation of light at 366 nm. Journal of the National Science Foundation of Sri Lanka. 1977;5(1):41–58.

Pereira, W. P. D., & Kathirgamanathan, P. (1977). An infinite optical path photoreactor and a filter for the isolation of light at 366 nm. Journal of the National Science Foundation of Sri Lanka, 5(1), 41–58.

1. Pereira WPD, Kathirgamanathan P. An infinite optical path photoreactor and a filter for the isolation of light at 366 nm. Journal of the National Science Foundation of Sri Lanka. 1977;5(1):41-58.

Pereira WPD and Kathirgamanathan P, ‘An Infinite Optical Path Photoreactor and a Filter for the Isolation of Light at 366 Nm’ (1977) 5 Journal of the National Science Foundation of Sri Lanka 41

Pereira, W. Pearlyn D., and P. Kathirgamanathan. 1977. “An Infinite Optical Path Photoreactor and a Filter for the Isolation of Light at 366 Nm”. Journal of the National Science Foundation of Sri Lanka 5 (1): 41–58.

Pereira, W. Pearlyn D., and P. Kathirgamanathan. “An Infinite Optical Path Photoreactor and a Filter for the Isolation of Light at 366 Nm”. Journal of the National Science Foundation of Sri Lanka 5, no. 1 (1977): 41–58.

Pereira, W P Dand P Kathirgamanathan. “An infinite optical path photoreactor and a filter for the isolation of light at 366 nm”. Journal of the National Science Foundation of Sri Lanka, vol. 5, no. 1, 1977, pp. 41–58.