1. Spatial frequency characteristic of human colour vision mechanisms;Bertulis;Medicina. Vilnius,1980
2. Selective sensitivity of colour vision mechanisms to spatial frequency;Bertulis;Human Physiol.,1983
3. Spectral and orientation specificity of single cells in foveal striate cortex of the vervet monkey;Bertulis;Cercopithecus aethiops, J. Physiol. (Lond.),1977
4. Achromatic and chromatic thresholds of colour mechanisms in human foveal vision;Bertulis;Medicina. Vilnius,1979
5. Lateral inhibition in human colour vision mechanisms;Bertulis;Medicina. Vilnius,1980