"No references" does not mean that the species does not occur in this country, but that we have not yet inserted the reference for it. We are working on it.
Bosmans R, Van Keer K (2017) Een herziene soortenlijst van de Belgische spinnen (Araneae). Nieuwsbrief van de Belgische Arachnologische Vereniging 32: 39-69
Noordijk J (2016) Nieuwe vondsten van weduwen Latrodectus in Nederland (Araneae: Theridiidae). Nederlandse Faunistische Mededelingen 47: 17-26
WSC (2024) World Spider Catalog. Version 25.0. Natural History Museum Bern, online at http://wsc.nmbe.ch (22.01.2024) doi: 10.24436/2
Yoshida H (2003) The spider family Theridiidae (Arachnida: Araneae) from Japan. Arachnological Society of Japan, 224 pp.
Žitko T, Bakić J (2018) Import of red-back spider Latrodectus hasselti Thorell, 1870 in Split in 2016 - case description. Zbornik Radova Znanstveno Stručno Edukativni Seminar s Međunarodnim Sudjelovanjem DDD i ZUPP 2018. Djelatnost dezinfekcije, dezinsekcije, deratizacije i zaštite uskladištenih, poljoprivrednih proizvoda 30: 139-148