Reference to previous research: Important studies
The first detailed study of X was …
Smith (1960) was one of the first to examine …
The first systematic study of X was reported by …
One of the most cited studies is that of Smith who sees …
X is most commonly associated with the work of Jones (1960).
The first major fieldwork project that was undertaken in X was …
A good summary of the classification of X has been provided in the work of …
In a comprehensive literature review of X, Smith identified three significant …
One well-known study that is often cited in research on X is that of Smith (1972), who found …
The innovative and seminal work of Smith pioneered a new approach to examining X and provided a
valuable insight into …
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