Complex sentence: The range of his work has been recognized in special issues of two journals, 10 years apart: the "IBM Journal of Research and Development" (January 1988) and "Superlattices and Microstructures" (March/April 1998).
Split into simpler sentences: The range of his work has been recognized in special issues of two journals, 10 years apart. They are the IBM Journal of Research and Development (January 1988) and the Superlattices and Microstructures (March/April 1998).