D. Bigirwa, L. R. Msese, R. Rwakalaza, and O. Bilame, “Tourists’ Willingness to Pay for Recreation Services in Nyerere National Park, Tanzania: Are We Overvaluing or Undervaluing Our Nature Recreation Resources?”, j. of Sustain. bus. and econ., vol. 6, no. 3, pp. 13–23, Jul. 2023.