We construct an infinite family of elliptic curves of rank at least 4 over Q with a rational point of order 6, which is parametrized by the rational points of an elliptic curve of rank at least 1.
"On the rank of the elliptic curves with a rational point of order 6." Proc. Japan Acad. Ser. A Math. Sci. 82 (7) 81 - 82, March 2006. https://doi.org/10.3792/pjaa.82.81