Ни его предшественники, ни последов

Ни его предшественники, ни последователи не изучали это явление с аналитической точки зрения

Результаты (английский) 1:

Nor his predecessors nor the followers did not study this phenomenon from an analytical point of view

Результаты (английский) 2:

None of his predecessors or successors have not studied this phenomenon from an analytical point of view,

Результаты (английский) 3:

his predecessors and followers studied this phenomenon from the analytical point of view