Kragh, H. (1998).
Kosmogoni. I
Den Store Danske Encyklopædi (Bind 11, s. 217-218). Gyldendal.
Deleuran, M., Ellingsen, A. R., Paludan, K., Schou, C. & Thestrup-Pedersen, K. (1998).
Purified Der p1 and p2 patch tests in patients with atopic dermatitis: evidence for both allergenicity and proteolytic irritancy.
Acta Dermato-Venereologica,
78(4), 241-243.
Kragh, H. (1998).
Scintillation counter. I R. Bud, S. Johnston & D. Warner (red.),
Instruments of Science: A Historical Encyclopedia (s. 525-526). Garland Science.
Kragh, H. (1998).
Spinthariscope. I R. Bud, S. Johnston & D. Warner (red.),
Instruments of Science: A Historical Encyclopedia (s. 572-573). Garland Science.