Lecocq T, Coppée A, Mathy T, Lhomme P, Cammaerts M-C, Urbanova K, Valterova I, Rasmont P (2015) Subspecific differentiation in male reproductive traits and virgin queen preferences, in Bombus terrestrisApidologie http://link.springer.com/article/10.1007%2Fs13592-015-0349-y