Complex sentence: After the war, he resumed his studies at the École Supérieure d'Electricité and subsequently obtained his Ph.D. from Oxford University in 1950 under the supervision of Maurice Pryce.
Split into simpler sentences: After the war, he resumed his studies at the École Supérieure d'Electricité. Finally, he obtained his Ph.D. from Oxford University in 1950 under the supervision of Maurice Pryce.