Here are two sources, the first of which is the more substantive. The problem is even hard to approximate, but algorithms are available that achieve about $2\frac{1}{2} \times$ the optimal packing.

(1) Miyazawa, Flavio Keidi, and Yoshiko Wakabayashi. "Three-dimensional packings with rotations." Computers & Operations Research. 36.10 (2009): 2801-2815. (PDF download.)

(2) E. Dube, L.R. Kanavathy. "Optimizing three-dimensional bin packing through simulation." Proc. Modeling, Simulation, Optimization. 2006. (PDF download.)

Here are two sources, the first of which is the more substantive. The problem is even hard to approximate, but algorithms are available that achieve about $2\frac{1}{2} \times$ the optimal packing.

(1) Miyazawa, Flavio Keidi, and Yoshiko Wakabayashi. "Three-dimensional packings with rotations." Computers & Operations Research. 36.10 (2009): 2801-2815. (PDF download.)

(2) E. Dube, L.R. Kanavathy. "Optimizing three-dimensional bin packing through simulation." Proc. Modeling, Simulation, Optimization. 2006. (PDF download

Here are two sources, the first of which is the more substantive. The problem is even hard to approximate, but algorithms are available that achieve about $2\frac{1}{2} \times$ the optimal packing.

(1) Miyazawa, Flavio Keidi, and Yoshiko Wakabayashi. "Three-dimensional packings with rotations." Computers & Operations Research. 36.10 (2009): 2801-2815. (PDF download.)

(2) E. Dube, L.R. Kanavathy. "Optimizing three-dimensional bin packing through simulation." 2006.  (PDF download.)

Here are two sources, the first of which is the more substantive. The problem is even hard to approximate, but algorithms are available that achieve about $2\frac{1}{2} \times$ the optimal packing.

(1) Miyazawa, Flavio Keidi, and Yoshiko Wakabayashi. "Three-dimensional packings with rotations." Computers & Operations Research. 36.10 (2009): 2801-2815. (PDF download.)

(2) E. Dube, L.R. Kanavathy. "Optimizing three-dimensional bin packing through simulation." Proc. Modeling, Simulation, Optimization. 2006.  (PDF download.)