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Carr, A. L., Mitchell III, R. D., Dhammi, A., Bissinger, B. W., Sonenshine, D. E., & Roe, R. M. (2017). Tick Haller’s Organ, a New Paradigm for Arthropod Olfaction: How Ticks Differ from Insects. International Journal of Molecular Sciences, 18(7). https://doi.org/10.3390/ijms18071563[2]
Good overview of Haller's organ from more recent article
..Carr, A. L., & Salgado, V. L. (2019). Ticks home in on body heat: A new understanding of Haller’s organ and repellent action. PLOS ONE, 14(8), e0221659. https://doi.org/10.1371/journal.pone.0221659
This is a primary source in a reputable journal, so should be credible. It is one of the few recent sources found that relate to physiology of the Haller's Organ.
