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Minn H, Kangas L, Kellokumpu-Lehtinen P, Klemi P, Sipilä H, Vuorinen J, Härkönen P, Lähde M.Minn H, et al. Among authors: harkonen p.Int J Rad Appl Instrum B. 1992 Jan;19(1):55-63. doi: 10.1016/0883-2897(92)90185-2.Int J Rad Appl Instrum B. 1992.PMID: 1315725