• A new type of differential gearRoosimölder, LembitOST-96 Symposium on Machine Design, [Stockholm] May 13-14, 1996 : program, abstracts1996 / [1] p https://www.ester.ee/record=b1033950*est
• A new type of differential gearRoosimölder, LembitOST-96 Symposium on Machine Design, [Stockholm], May 13-14, 1996 : proceedings1996 / p. 126-130: ill