Effects of stretching before and after exercising on muscle soreness and risk of injury: systematic review

These results correspond to german scientific results of Wiemann,
Wiemann/Kamphoefner, Wiemann/Klee, Klee. One of those is printed in the
Deutsche Zeitschrift für Sportmedizin, No 9/1995, p. 411 ff.

Further interesting article:
Hennig/Podzielny: The effect of stretching and warm-up exercises on
vertical jump performance. Deutsche Zeitschrift für Sportmedizin, No
6/1994, p. 253 ff

Further articles of these and other authors on the use of stretching
at the school's lessons in sports you can find at the journal (paper)
"sportunterricht" or "sport praxis".