Guthrie, Wendy, and Andy Lowe. “Infiltration: An Emerging Grounded Theory Explanation of Penetrating and Sustaining a Presence Within the Inner Circles of Others”. Grounded Theory Review, vol. 22, no. 2, Dec. 2023, pp. 6-24, https://groundedtheoryreview.org/index.php/gtr/article/view/9.