Williams, Paul H., Natural History Museum, Cromwell Road, London SW7 5BD, UK, United Kingdom

• European Journal of Taxonomy Vol. 847 (2022) - Research article
  Bumblebees of the hypnorum-complex world-wide including two new near-cryptic species (Hymenoptera: Apidae)
  Abstract  PDF  PDF/A  GBIF  BLR  PRINT
• European Journal of Taxonomy Vol. 892 (2023) - Monograph
  Bumblebees with big teeth: revising the subgenus Alpigenobombus with the good, the bad and the ugly of numts (Hymenoptera: Apidae)
  Abstract  PDF  PDF/A  GBIF  BLR  SUPP. FILE 1  PRINT