For each of the positive edge-triggered JK flip-flop used
J-K Flip-Flop
JK flip flop - Javatpoint
This happens to be a negative edge triggered JK flip flop. I used boolean algebra and found D = E' and E = D'. Given the propagation delay I thought this was
Introduction to JK Flip Flop - The Engineering Projects
JK Flip Flop and the Master-Slave JK Flip Flop Tutorial
J-K Flip-Flop
Introduction to JK Flip Flop - The Engineering Projects
J-K Flip-Flop
Solved For the following circuit that uses two JK flip flops | Chegg.com
Sequential Logic FlipFlops and Related Devices chapter 8