His orchestral music was his strong suit, notably the Serenade for Strings, Op.

The first public presentation of one of Mortensen's compositions was the Trio for Strings, Op.

Divertimento for Strings, Op 51 (2007)

Concerto for Strings, Op.

Small Symphony for Strings, Op.

Its companions are the Symphony for Strings (Op.

Variations on an Original Theme for Strings, Op.

One source says Erdmannsdörfer conducted the premiere of Tchaikovsky's Serenade for Strings, Op.

Other works will include the Quartet for Bassoon and Strings, Op.

Based on a motive from Mr. Persichetti's Symphony for Strings (Op.