On pure global dimension of locally finitely presented Grothendieck categories Daniel Simson (1977) Fundamenta Mathematicae
On rings whose flat modules form a Grothendieck category J. Garcia, D. Simson (1997) Colloquium Mathematicae
On the category of commutative connected graded Hopf algebras over a perfect field Daniel Simson, Andrzej Skowroński (1978) Fundamenta Mathematicae
On the structure of locally finite pure semisimple Grothendieck categories Daniel Simson (1982) Cahiers de Topologie et Géométrie Différentielle Catégoriques