| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 2017 | 978-0-9978303-0-9 | Dale A Johanson | Approximating Distances Between World Capitals: Applying the Spherical Law of Cosines for Sides (Spherical Trigonometry Activities) |
| 2018 | 978-0-9978303-1-6 | Dale Johanson | Measuring Distances in Africa: Applying the Spherical Law of Cosines for Sides |
| '' | 978-0-9978303-2-3 | '' | Measuring Distances in Europe: Applying the Spherical Law of Cosines for Sides |
| 2019 | 978-0-9978303-3-0 | '' | State Capitals and the Distance Between Them: Applying the Spherical Law of Cosines for Sides (Spherical Trigonometry Activities) |