KITKAS, G.C., VALERGAKIS, G.E., KRITSEPI-KONSTANTINOU, M., GELASAKIS, A.I., ARSENOS, G., KALAITZAKIS, E. and PANOUSIS, N. 2019. Effects of ruminal pH and subacute ruminal acidosis on milk yield and composition of Holstein cows in different stages of lactation. Journal of the Hellenic Veterinary Medical Society. 70, 2 (Jul. 2019), 1551–1560. DOI:https://doi.org/10.12681/jhvms.20861.