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by Roseberry, Lynn; Roos, Johan
by Floyd, Steven W.; Roos, Johan; Jacobs, Claus D.; et al.
by Statler, Matt; Roos, Johan
by Georg von Krogh; Johan Roos
by Roos, Johan; Roos, Goran; Dragonetti, Nicola Carlo; et al.
by Lorange, Peter; Roos, Johan
by Lissack, Michael; Roos, Johan