R.  Rosengren, ?Nest founding in Camponotus herculeanus and Formica fusca (Hymenoptera, Formicidae). ?, Notulae Entomologicae, vol. 66, pp. 121-123, 1986.

R.  Rosengren, ?En tredje fundort av den svarta hästmyran Camponotus vagus (Scopoli) I sydvästra Finland (Formicidae).?, Notulae Entomologicae, vol. 61, p. 227, 1981.

R.  Rosengren, ?Notes regarding the growth of a polycalic nest system in Formica uralensis Ruzsky.?, Notulae Entomologicae, vol. 49, pp. 211-230, 1969.