Natyashastra
नेकयुक्तिविचित्रार्थं पौरुषं भावमिश्रितम् । एकाङ्गशीर्षकं गत्या द्विभूषं परिकीर्तितम् ॥ ३२३॥
It is said to be Dvibhūṣa when it contains a single leading section (eka-aṅga-śīrṣaka), is full of diverse meanings with many devices (anekayukti-vicitrārtha), expressed through masculine emotions (pauruṣa-bhāva-miśrita), and performed with appropriate movement (gati).
english translation
nekayuktivicitrArthaM pauruSaM bhAvamizritam । ekAGgazIrSakaM gatyA dvibhUSaM parikIrtitam ॥ 323॥
hk transliteration by Sanscript