All of these works

Alexander wrote under my leadership (I was his teacher, is “leadership” correct here? - Yes, this is fine) term papers on the following topics: "A1", "A2", "A3". All of these works are distinguished by the depth of paradoxical formulation of philosophical problems, and, moreover, his explanations are based on the author’s solid philosophical erudition. Alexander comes across as a man capable of independent search and review of the philosophical paradoxes: (that's a colon replacing the comma that was there) communicative, disciplined, responsible, and having a desire and capacity to realize itself distinguish himself in the field of philosophy.