On the specification of software components. - Michael Goedicke; Harald Schumann; Joachim Cramer (IWSSD, 1991)

Towards a Formally Based Component Description Language. - Joachim Cramer; Werner Fey; Michael Goedicke; Martin Große-Rhode (TAPSOFT, Vol.2, 1991)

Towards a Formally Based Component Description Language - A Foundation for Reuse. - Joachim Cramer; Werner Fey; Michael Goedicke; Martin Große-Rhode (Struct. Program., 1991)

Interconnecting and reusing component specifications. - Joachim Cramer (1994)