Tolong jelaskan mengenai Rujukan dari Allvar Gullstrand dalam bahasa melayu

Maximilian Herzberger (1960) "Allvar Gullstrand", [Journal of Modern Optics 7:237–41.

Ian R. Porteous (2001) Geometric Differentiation, pp 201,205,271,285, Cambridge University Press  .

Frank Tsai (2009) Who was Allvar Gullstrand from Pearls in Ophthalmology.

Penerima Hadiah Nobel dalam Fisiologi atau Perubatan