1. Anderson KL, Smith AR, Spahr SL, Gustafsson BK, Hixon JE, Weston PG, Jaster EH, Shanks RD, Whitmore HL: Influence of the estrous cycle on selected biochemical and cytologic characteristics of milk of cows with subclinical mastitis. Amer. J. vet. Res. 1983, 44, 677–680.
2. Anonymous: Årsstatistik inkl. djurhälsovård SHS 1990/91 (Annual report 1990/91 from Animal Health Service), Association for Swedish Life-stock Breeding and Production, Eskilstuna, Sweden 1992.
3. Berning LM, Paape MJ, Miller RH: Effects of estradiol benzoate and estrus on N-Acetyl-ß-D-glucos-aminidase activity and somatic cell concentration in milk. J. Dairy Sci. 1987a, 70, 1302–1306.
4. Berning LM, Paape MJ, Miller RH, LeDane RA: Variation in N-acetyl-ß-D-glucosaminidase activity and somatic cell count among various milk fractions. J. Dairy Sci. 1987b, 70, 1054–1060.
5. Blackburn PS, Laing CM, Malcolm DF: A comparison of the diagnostic value of the total and differential cell counts of bovine milk. J. Dairy Res. 1955, 22, 37–42.